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  <attribute name="title" value="VOC (hydrocarbons) at Cape Verde Atmospheric Observatory" />
  <attribute name="summary" value="VOC (hydrocarbons) at Cape Verde Atmospheric Observatory. These measurements are gathered as a part of the following projects ACTRIS, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['2-methylbutane in air (mass_concentration_of_2-methylbutane_in_air)', '2-methylbutane in air (mole_fraction_of_2_methylbutane_in_air)', '2-methylpropane in air (mass_concentration_of_2-methylpropane_in_air)', '2-methylpropane in air (mole_fraction_of_2_methylpropane_in_air)', 'benzene in air (mole_fraction_of_benzene_in_air)', 'ethane in air (mass_concentration_of_ethane_in_air)', 'ethane in air (mole_fraction_of_ethane_in_air)', 'ethene in air (mole_fraction_of_ethene_in_air)', 'ethyne in air (mole_fraction_of_ethyne_in_air)', 'isoprene in air (mass_concentration_of_isoprene_in_air)', 'isoprene in air (mole_fraction_of_isoprene_in_air)', 'n-butane in air (mass_concentration_of_n-butane_in_air)', 'n-butane in air (mole_fraction_of_butane_in_air)', 'n-pentane in air (mass_concentration_of_n-pentane_in_air)', 'n-pentane in air (mole_fraction_of_pentane_in_air)', 'propane in air (mass_concentration_of_propane_in_air)', 'propane in air (mole_fraction_of_propane_in_air)']" />
  <attribute name="keywords" value="&quot;Cape Verde Atmospheric Observatory&quot; CV0001G 2-methylbutane 2-methylpropane benzene ethane ethene ethyne isoprene n-butane n-pentane propane air ACTRIS GAW-WDCRG mass_concentration_of_2-methylbutane_in_air mole_fraction_of_2_methylbutane_in_air mass_concentration_of_2-methylpropane_in_air mole_fraction_of_2_methylpropane_in_air mole_fraction_of_benzene_in_air mass_concentration_of_ethane_in_air mole_fraction_of_ethane_in_air mole_fraction_of_ethene_in_air mole_fraction_of_ethyne_in_air mass_concentration_of_isoprene_in_air mole_fraction_of_isoprene_in_air mass_concentration_of_n-butane_in_air mole_fraction_of_butane_in_air mass_concentration_of_n-pentane_in_air mole_fraction_of_pentane_in_air mass_concentration_of_propane_in_air mole_fraction_of_propane_in_air" />
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  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="ACTRIS, GAW-WDCRG" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/765R-D64M" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Nelson, B., ACTRIS, GAW-WDCRG, 2026, VOC (hydrocarbons) at Cape Verde Atmospheric Observatory, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/765R-D64M" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="GB12L &quot;National Centre for Atmospheric Science&quot; NCAS &quot;Department of Chemistry&quot; &quot;University of York&quot; &quot;YO10 5DD&quot; York &quot;United Kingdom&quot;" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-11T12:08:21.287366Z" />
  <attribute name="date_metadata_modified" value="2026-01-16T00:00:00Z" />
  <attribute name="creator_name" value="Beth Nelson" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="beth.nelson@york.ac.uk" />
  <attribute name="creator_institution" value="&quot;University of York, Wolfson Atmospheric Chemistry Laboratory, UofY&quot;" />
  <attribute name="contributor_name" value="Beth Nelson" />
  <attribute name="contributor_role" value="data submitter" />
  <attribute name="publisher_type" value="institution" />
  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (-24.86752 16.86403 10)" />
  <attribute name="geospatial_lat_min" type="double" value="16.86403" />
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  <attribute name="time_coverage_end" value="2024-12-31T23:03:00Z" />
  <attribute name="time_coverage_duration" value="P0000-11-30T22:59:00" />
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  <attribute name="timezone" value="UTC" />
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  <attribute name="ebas_citation" value="Nelson, B., ACTRIS, GAW-WDCRG, 2026, VOC (hydrocarbons) at Cape Verde Atmospheric Observatory, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/765R-D64M" />
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  <attribute name="ebas_file_creation" value="2026-06-14T01:32:03.582686Z" />
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  <attribute name="ebas_startdate" value="2024-01-01T00:04:00.000000Z" />
  <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="first revision" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="1y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="40mn" />
  <attribute name="ebas_orig_time_res" value="1h" />
  <attribute name="ebas_station_code" value="CV0001G" />
  <attribute name="ebas_platform_code" value="CV0001S" />
  <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
  <attribute name="ebas_station_gaw_id" value="CVO" />
  <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
  <attribute name="ebas_station_land_use" value="Gravel and stone" />
  <attribute name="ebas_station_setting" value="Coastal" />
  <attribute name="ebas_station_gaw_type" value="G" />
  <attribute name="ebas_station_wmo_region" type="long" value="1" />
  <attribute name="ebas_station_latitude" type="double" value="16.86403" />
  <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
  <attribute name="ebas_station_altitude" value="10.0 m" />
  <attribute name="ebas_measurement_altitude" value="10.0 m" />
  <attribute name="ebas_measurement_height" value="10.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="CV01L" />
  <attribute name="ebas_instrument_type" value="online_gc" />
  <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
  <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
  <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
  <attribute name="ebas_instrument_serial_number" value="CN12191070" />
  <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
  <attribute name="ebas_standard_method" value="None" />
  <attribute name="ebas_calibration_scale" value="NPL" />
  <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
  <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
  <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
  <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
  <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
  <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
  <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
  <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
  <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
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  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
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  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="time" length="8001" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="qc_2_methylbutane_ng_per_m3_amean_flags" length="2" />
  <dimension name="qc_2_methylbutane_pmol_per_mol_amean_flags" length="2" />
  <dimension name="qc_2_methylbutane_ng_per_m3_ExpUnc2s_flags" length="3" />
  <dimension name="qc_2_methylbutane_pmol_per_mol_ExpUnc2s_flags" length="3" />
  <dimension name="qc_2_methylbutane_ng_per_m3_precision_flags" length="3" />
  <dimension name="qc_2_methylbutane_pmol_per_mol_precision_flags" length="3" />
  <dimension name="qc_2_methylpropane_ng_per_m3_amean_flags" length="2" />
  <dimension name="qc_2_methylpropane_pmol_per_mol_amean_flags" length="2" />
  <dimension name="qc_2_methylpropane_ng_per_m3_ExpUnc2s_flags" length="3" />
  <dimension name="qc_2_methylpropane_pmol_per_mol_ExpUnc2s_flags" length="3" />
  <dimension name="qc_2_methylpropane_ng_per_m3_precision_flags" length="3" />
  <dimension name="qc_2_methylpropane_pmol_per_mol_precision_flags" length="3" />
  <dimension name="qc_benzene_ng_per_m3_amean_flags" length="1" />
  <dimension name="qc_benzene_pmol_per_mol_amean_flags" length="1" />
  <dimension name="qc_benzene_ng_per_m3_ExpUnc2s_flags" length="2" />
  <dimension name="qc_benzene_pmol_per_mol_ExpUnc2s_flags" length="2" />
  <dimension name="qc_benzene_ng_per_m3_precision_flags" length="2" />
  <dimension name="qc_benzene_pmol_per_mol_precision_flags" length="2" />
  <dimension name="qc_ethane_ng_per_m3_amean_flags" length="1" />
  <dimension name="qc_ethane_pmol_per_mol_amean_flags" length="1" />
  <dimension name="qc_ethane_ng_per_m3_ExpUnc2s_flags" length="1" />
  <dimension name="qc_ethane_pmol_per_mol_ExpUnc2s_flags" length="1" />
  <dimension name="qc_ethane_ng_per_m3_precision_flags" length="1" />
  <dimension name="qc_ethane_pmol_per_mol_precision_flags" length="1" />
  <dimension name="qc_ethene_amean_flags" length="2" />
  <dimension name="qc_ethene_ExpUnc2s_flags" length="3" />
  <dimension name="qc_ethene_precision_flags" length="3" />
  <dimension name="qc_ethyne_amean_flags" length="1" />
  <dimension name="qc_ethyne_ExpUnc2s_flags" length="1" />
  <dimension name="qc_ethyne_precision_flags" length="1" />
  <dimension name="qc_isoprene_ng_per_m3_amean_flags" length="2" />
  <dimension name="qc_isoprene_pmol_per_mol_amean_flags" length="2" />
  <dimension name="qc_isoprene_ng_per_m3_ExpUnc2s_flags" length="3" />
  <dimension name="qc_isoprene_pmol_per_mol_ExpUnc2s_flags" length="3" />
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  <dimension name="qc_isoprene_pmol_per_mol_precision_flags" length="3" />
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  <dimension name="qc_n_butane_pmol_per_mol_amean_flags" length="2" />
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  <dimension name="qc_n_pentane_pmol_per_mol_amean_flags" length="2" />
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  <dimension name="qc_n_pentane_pmol_per_mol_precision_flags" length="3" />
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    <attribute name="long_name" value="time bounds for measurement" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
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    <attribute name="ebas_version_description" value="first revision" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
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    <attribute name="ebas_matrix" value="air" />
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    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
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    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.219. Detection limit converted from '1.0 pmol/mol' to '3.2 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.219." />
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    <attribute name="actris_variable_preferred_term" value="2-methylbutane mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_access_restriction" type="long" value="0" />
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    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
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  <variable name="meta_2_methylbutane_ng_per_m3_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_2_methylbutane_pmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_2_methylbutane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_2_methylbutane_pmol_per_mol_amean meta_2_methylbutane_pmol_per_mol_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_station_wmo_region" type="long" value="1" />
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    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="2-methylbutane" />
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    <attribute name="ebas_laboratory_code" value="CV01L" />
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    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/2-methylbutaneamountfraction" />
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    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="qc_2_methylbutane_pmol_per_mol_amean" shape="qc_2_methylbutane_pmol_per_mol_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="units" value="1" />
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  <variable name="meta_2_methylbutane_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_2-methylbutane_in_air" />
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    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="2-methylbutane" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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  <variable name="qc_2_methylbutane_pmol_per_mol_ExpUnc2s" shape="qc_2_methylbutane_pmol_per_mol_ExpUnc2s_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_2-methylbutane_in_air" />
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    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
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    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/2-methyl-propaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="2-methyl-propane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_2_methylpropane_pmol_per_mol_amean" shape="qc_2_methylpropane_pmol_per_mol_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_2_methylpropane_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_2_methylpropane_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_2-methylpropane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_2_methylpropane_ng_per_m3_ExpUnc2s meta_2_methylpropane_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version" value="1" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="2-methylpropane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_standard_method" value="None" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
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    <attribute name="actris_variable_preferred_term" value="2-methyl-propane mass concentration" />
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    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_2_methylpropane_ng_per_m3_ExpUnc2s" shape="qc_2_methylpropane_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_2_methylpropane_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_2_methylpropane_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_2_methylpropane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ancillary_variables" value="qc_2_methylpropane_pmol_per_mol_ExpUnc2s meta_2_methylpropane_pmol_per_mol_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
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    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
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    <attribute name="ebas_station_gaw_type" value="G" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="2-methylpropane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/2-methyl-propaneamountfraction" />
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  <variable name="qc_2_methylpropane_pmol_per_mol_ExpUnc2s" shape="qc_2_methylpropane_pmol_per_mol_ExpUnc2s_flags time" type="int">
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  <variable name="meta_2_methylpropane_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_2_methylpropane_ng_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_2-methylpropane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_2_methylpropane_ng_per_m3_precision meta_2_methylpropane_ng_per_m3_precision" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="2-methylpropane" />
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    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 2.593." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/2-methyl-propanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="2-methyl-propane mass concentration" />
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    <attribute name="actris_temporal_resolution" value="PT1H" />
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    <attribute name="standard_name" value="status_flag" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_2_methylpropane_pmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_2_methylpropane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_2_methylpropane_pmol_per_mol_precision meta_2_methylpropane_pmol_per_mol_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version_description" value="first revision" />
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    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_station_code" value="CV0001G" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="2-methylpropane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
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    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/2-methyl-propaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="2-methyl-propane amount fraction" />
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    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="qc_2_methylpropane_pmol_per_mol_precision" shape="qc_2_methylpropane_pmol_per_mol_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
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  <variable name="meta_2_methylpropane_pmol_per_mol_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_benzene_ng_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_benzene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_benzene_ng_per_m3_amean meta_benzene_ng_per_m3_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_station_code" value="CV0001G" />
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    <attribute name="ebas_station_gaw_type" value="G" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="benzene" />
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    <attribute name="ebas_laboratory_code" value="CV01L" />
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    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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  <variable name="qc_benzene_ng_per_m3_amean" shape="qc_benzene_ng_per_m3_amean_flags time" type="int">
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  <variable name="meta_benzene_ng_per_m3_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_benzene_pmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_benzene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_station_code" value="CV0001G" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_gaw_type" value="G" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
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    <attribute name="ebas_component" value="benzene" />
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    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/benzeneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="benzene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_benzene_pmol_per_mol_amean" shape="qc_benzene_pmol_per_mol_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_benzene_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_benzene_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_benzene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_benzene_ng_per_m3_ExpUnc2s meta_benzene_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="benzene" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.485." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/benzenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="benzene mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_benzene_ng_per_m3_ExpUnc2s" shape="qc_benzene_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_benzene_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_benzene_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_benzene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_benzene_pmol_per_mol_ExpUnc2s meta_benzene_pmol_per_mol_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="benzene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/benzeneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="benzene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
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    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_benzene_pmol_per_mol_ExpUnc2s" shape="qc_benzene_pmol_per_mol_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_benzene_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_benzene_ng_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_benzene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_benzene_ng_per_m3_precision meta_benzene_ng_per_m3_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="benzene" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
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    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
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    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.485." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/benzenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="benzene mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_benzene_ng_per_m3_precision" shape="qc_benzene_ng_per_m3_precision_flags time" type="int">
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="_FillValue" type="int" value="0" />
  </variable>
  <variable name="meta_benzene_ng_per_m3_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_benzene_pmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_benzene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_benzene_pmol_per_mol_precision meta_benzene_pmol_per_mol_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="benzene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/benzeneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="benzene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_benzene_pmol_per_mol_precision" shape="qc_benzene_pmol_per_mol_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_benzene_pmol_per_mol_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethane_ng_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ethane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_ethane_ng_per_m3_amean meta_ethane_ng_per_m3_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="5.4 ng/m3" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.342. Detection limit converted from '4.0 pmol/mol' to '5.4 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.342." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ethane mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethane_ng_per_m3_amean" shape="qc_ethane_ng_per_m3_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethane_ng_per_m3_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethane_pmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethane_pmol_per_mol_amean meta_ethane_pmol_per_mol_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit" value="4.0 pmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethane_pmol_per_mol_amean" shape="qc_ethane_pmol_per_mol_amean_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_ethane_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethane_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ethane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_ethane_ng_per_m3_ExpUnc2s meta_ethane_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.342." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ethane mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethane_ng_per_m3_ExpUnc2s" shape="qc_ethane_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethane_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethane_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethane_pmol_per_mol_ExpUnc2s meta_ethane_pmol_per_mol_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
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    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethane_pmol_per_mol_ExpUnc2s" shape="qc_ethane_pmol_per_mol_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethane_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethane_ng_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ethane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_ethane_ng_per_m3_precision meta_ethane_ng_per_m3_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
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    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.342." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ethane mass concentration" />
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    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethane_ng_per_m3_precision" shape="qc_ethane_ng_per_m3_precision_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="missing_value" type="int" value="0" />
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  <variable name="meta_ethane_ng_per_m3_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethane_pmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethane_pmol_per_mol_precision meta_ethane_pmol_per_mol_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
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    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethane_pmol_per_mol_precision" shape="qc_ethane_pmol_per_mol_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethane_pmol_per_mol_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethene_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethene_amean meta_ethene_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit" value="4.0 pmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/etheneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethene_amean" shape="qc_ethene_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethene_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethene_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethene_ExpUnc2s meta_ethene_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/etheneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethene_ExpUnc2s" shape="qc_ethene_ExpUnc2s_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_ethene_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethene_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethene_precision meta_ethene_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/etheneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethene_precision" shape="qc_ethene_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethene_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethyne_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethyne_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethyne_amean meta_ethyne_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethyne" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit" value="1.0 pmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethyneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethyne amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethyne_amean" shape="qc_ethyne_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethyne_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethyne_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethyne_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethyne_ExpUnc2s meta_ethyne_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethyne" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethyneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethyne amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethyne_ExpUnc2s" shape="qc_ethyne_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ethyne_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ethyne_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ethyne_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_ethyne_precision meta_ethyne_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ethyne" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethyneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ethyne amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ethyne_precision" shape="qc_ethyne_precision_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_ethyne_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_isoprene_ng_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_isoprene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_isoprene_ng_per_m3_amean meta_isoprene_ng_per_m3_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="isoprene" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="3.0 ng/m3" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.039. Detection limit converted from '1.0 pmol/mol' to '3.0 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.039." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/isoprenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="isoprene mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_isoprene_ng_per_m3_amean" shape="qc_isoprene_ng_per_m3_amean_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_isoprene_ng_per_m3_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_isoprene_pmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_isoprene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_isoprene_pmol_per_mol_amean meta_isoprene_pmol_per_mol_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="isoprene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit" value="1.0 pmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/isopreneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="isoprene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_isoprene_pmol_per_mol_amean" shape="qc_isoprene_pmol_per_mol_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_isoprene_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_isoprene_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_isoprene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_isoprene_ng_per_m3_ExpUnc2s meta_isoprene_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="isoprene" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.039." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/isoprenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="isoprene mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_isoprene_ng_per_m3_ExpUnc2s" shape="qc_isoprene_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_isoprene_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_isoprene_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_isoprene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_isoprene_pmol_per_mol_ExpUnc2s meta_isoprene_pmol_per_mol_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="isoprene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/isopreneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="isoprene amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="qc_isoprene_pmol_per_mol_ExpUnc2s" shape="qc_isoprene_pmol_per_mol_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_isoprene_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_isoprene_ng_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_isoprene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_isoprene_ng_per_m3_precision meta_isoprene_ng_per_m3_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
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    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="isoprene" />
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    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.039." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/isoprenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="isoprene mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_isoprene_ng_per_m3_precision" shape="qc_isoprene_ng_per_m3_precision_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
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  <variable name="meta_isoprene_ng_per_m3_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_isoprene_pmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_isoprene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_isoprene_pmol_per_mol_precision meta_isoprene_pmol_per_mol_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
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    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="isoprene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_calibration_scale" value="NPL" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
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  <variable name="qc_isoprene_pmol_per_mol_precision" shape="qc_isoprene_pmol_per_mol_precision_flags time" type="int">
    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_n_butane_ng_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_n-butane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-butane" />
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    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
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    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 2.593. Detection limit converted from '1.0 pmol/mol' to '2.6 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 2.593." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-butanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="n-butane mass concentration" />
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    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_butane_ng_per_m3_amean" shape="qc_n_butane_ng_per_m3_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_n_butane_ng_per_m3_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_butane_pmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_butane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_n_butane_pmol_per_mol_amean meta_n_butane_pmol_per_mol_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-butane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit" value="1.0 pmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-butaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="n-butane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_butane_pmol_per_mol_amean" shape="qc_n_butane_pmol_per_mol_amean_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_n_butane_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_butane_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_n-butane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_n_butane_ng_per_m3_ExpUnc2s meta_n_butane_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-butane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 2.593." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-butanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="n-butane mass concentration" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_butane_ng_per_m3_ExpUnc2s" shape="qc_n_butane_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_n_butane_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_butane_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_butane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_n_butane_pmol_per_mol_ExpUnc2s meta_n_butane_pmol_per_mol_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-butane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
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    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
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    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-butaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="n-butane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_butane_pmol_per_mol_ExpUnc2s" shape="qc_n_butane_pmol_per_mol_ExpUnc2s_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_n_butane_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_butane_ng_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_n-butane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_n_butane_ng_per_m3_precision meta_n_butane_ng_per_m3_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
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    <attribute name="ebas_platform_code" value="CV0001S" />
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  <variable name="qc_n_butane_ng_per_m3_precision" shape="qc_n_butane_ng_per_m3_precision_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
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    <attribute name="ebas_component" value="n-butane" />
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    <attribute name="ebas_matrix" value="air" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_pentane_in_air" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-pentane" />
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    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit" value="1.0 pmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-pentaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="n-pentane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_pentane_pmol_per_mol_amean" shape="qc_n_pentane_pmol_per_mol_amean_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_n_pentane_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_pentane_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_n-pentane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_n_pentane_ng_per_m3_ExpUnc2s meta_n_pentane_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-pentane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.219." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-pentanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="n-pentane mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_pentane_ng_per_m3_ExpUnc2s" shape="qc_n_pentane_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_n_pentane_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_pentane_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_pentane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_n_pentane_pmol_per_mol_ExpUnc2s meta_n_pentane_pmol_per_mol_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
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    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-pentane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
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    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-pentaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="n-pentane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_pentane_pmol_per_mol_ExpUnc2s" shape="qc_n_pentane_pmol_per_mol_ExpUnc2s_flags time" type="int">
    <attribute name="units" value="1" />
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    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_n_pentane_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_pentane_ng_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_n-pentane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_n_pentane_ng_per_m3_precision meta_n_pentane_ng_per_m3_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_orig_time_res" value="1h" />
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    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
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    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-pentane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.219." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-pentanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="n-pentane mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_pentane_ng_per_m3_precision" shape="qc_n_pentane_ng_per_m3_precision_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_n_pentane_ng_per_m3_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_n_pentane_pmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_pentane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_n_pentane_pmol_per_mol_precision meta_n_pentane_pmol_per_mol_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="n-pentane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/n-pentaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="n-pentane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_n_pentane_pmol_per_mol_precision" shape="qc_n_pentane_pmol_per_mol_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_n_pentane_pmol_per_mol_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_propane_ng_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_propane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_propane_ng_per_m3_amean meta_propane_ng_per_m3_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="propane" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="11.8 ng/m3" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.967. Detection limit converted from '6.0 pmol/mol' to '11.8 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.967." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/propanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="propane mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_propane_ng_per_m3_amean" shape="qc_propane_ng_per_m3_amean_flags time" type="int">
    <attribute name="units" value="1" />
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="meta_propane_ng_per_m3_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_propane_pmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_propane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_propane_pmol_per_mol_amean meta_propane_pmol_per_mol_amean" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="propane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
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    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/propaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="propane amount fraction" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_propane_pmol_per_mol_amean" shape="qc_propane_pmol_per_mol_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
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  <variable name="meta_propane_pmol_per_mol_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_propane_ng_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_propane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_propane_ng_per_m3_ExpUnc2s meta_propane_ng_per_m3_ExpUnc2s" />
    <attribute name="cell_methods" value="time: expanded uncertainty 2sigma" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="first revision" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="40mn" />
    <attribute name="ebas_orig_time_res" value="1h" />
    <attribute name="ebas_station_code" value="CV0001G" />
    <attribute name="ebas_platform_code" value="CV0001S" />
    <attribute name="ebas_station_name" value="Cape Verde Atmospheric Observatory" />
    <attribute name="ebas_station_gaw_id" value="CVO" />
    <attribute name="ebas_station_gaw_name" value="Cape Verde Observatory" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="propane" />
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    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 1.967." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/propanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="propane mass concentration" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_propane_ng_per_m3_ExpUnc2s" shape="qc_propane_ng_per_m3_ExpUnc2s_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
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  <variable name="meta_propane_ng_per_m3_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_propane_pmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_propane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_component" value="propane" />
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  <variable name="meta_propane_pmol_per_mol_ExpUnc2s" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_propane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_component" value="propane" />
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    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/propanemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="propane mass concentration" />
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  <variable name="qc_propane_ng_per_m3_precision" shape="qc_propane_ng_per_m3_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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  <variable name="meta_propane_ng_per_m3_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_propane_pmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_propane_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="qc_propane_pmol_per_mol_precision meta_propane_pmol_per_mol_precision" />
    <attribute name="cell_methods" value="time: precision" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-01-16T00:00:00.000000Z" />
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    <attribute name="ebas_version_description" value="first revision" />
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    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Coastal" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="1" />
    <attribute name="ebas_station_latitude" type="double" value="16.86403" />
    <attribute name="ebas_station_longitude" type="double" value="-24.86752" />
    <attribute name="ebas_station_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_altitude" value="10.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="propane" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="CV01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="Agilent_GC-FID_7890A_G3440A" />
    <attribute name="ebas_instrument_manufacturer" value="MARKES+MARKES+Agilent" />
    <attribute name="ebas_instrument_model" value="Air Server+UNITY2+7890A GC/FID" />
    <attribute name="ebas_instrument_serial_number" value="CN12191070" />
    <attribute name="ebas_method_ref" value="CV01L_Manual_AIR_only" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_calibration_standard_id" value="Manufacturer NPL; Batch D933520" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing with hood, 15m total length, insulated, 1m/s flow" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit equals 3 times the precision" />
    <attribute name="ebas_measurement_uncertainty_expl" value="expanded uncertainity 2 sigma and it includes reproducibility (precision) + systematic error" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_organization" value="GB12L, National Centre for Atmospheric Science, NCAS, , Department of Chemistry, University of York, YO10 5DD, York, United Kingdom" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_submitter" value="&quot;Nelson, Beth, beth.nelson@york.ac.uk, University of York, UofY, Wolfson Atmospheric Chemistry Laboratory, Innovation Way, Heslington, YO10 5DQ, York, United Kingdom&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Preconcentration by commercial  MARKES unit, o3  removal by heated stainless steel lines , Sterling Coolers and condensing chilllers use for water removal , monthly calibration interval. Sampling duration is 40.8mn on average" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/propaneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="propane amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_propane_pmol_per_mol_precision" shape="qc_propane_pmol_per_mol_precision_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_propane_pmol_per_mol_precision" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="time" shape="time" type="double">
    <attribute name="long_name" value="time of measurement" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="standard" />
    <attribute name="bounds" value="time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="metadata_time" shape="metadata_time" type="double">
    <attribute name="long_name" value="time of ebas metadata intervals" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="standard" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
</netcdf>
