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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Nitrogen oxides at Hyytiälä" />
  <attribute name="keywords" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air, NOx, mole_fraction_of_nitrogen_dioxide_in_air, CAMPAIGN, GAW-WDCRG, mole_fraction_of_nitrogen_monoxide_in_air, mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air, Hyytiälä, FI0050R, mole_fraction_of_nox_in_air, EMEP, air, nitrogen_dioxide, nitrogen_monoxide, mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
  <attribute name="id" value="WVN8-QAWX.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="CAMPAIGN, EMEP, GAW-WDCRG" />
  <attribute name="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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
  <attribute name="doi" value="https://doi.org/10.48597/WVN8-QAWX" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Petäjä, T., CAMPAIGN, EMEP, GAW-WDCRG, 2024, Nitrogen oxides at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/WVN8-QAWX" />
  <attribute name="summary" value="Nitrogen oxides at Hyytiälä. These measurements are gathered as a part of the following projects CAMPAIGN, EMEP, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: NOx in air (mole_fraction_of_nox_in_air), NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air), NOx in air (mole_fraction_of_nox_in_air), NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air), NOx in air (mole_fraction_of_nox_in_air), NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air), NOx in air (mole_fraction_of_nox_in_air), NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air), NOx in air (mole_fraction_of_nox_in_air), NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air), NOx in air (mole_fraction_of_nox_in_air), NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air), nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air), nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air), nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air), nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air), nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air), nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air), nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air), nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air), nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, FI-00014, University of Helsinki, Finland" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2024-09-16T10:34:40 UTC" />
  <attribute name="date_metadata_modified" value="2024-09-16T10:34:40 UTC" />
  <attribute name="creator_name" value="Tuukka Petäjä" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="tuukka.petaja@helsinki.fi" />
  <attribute name="creator_institution" value="&quot;University of Helsinki, Division of Atmospheric Sciences, Department of Physics, UHEL&quot;" />
  <attribute name="contributor_name" value="Petri Keronen" />
  <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 (61.85 24.283333 181.0)" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="geospatial_lat_min" type="double" value="61.85" />
  <attribute name="geospatial_lat_max" type="double" value="61.85" />
  <attribute name="geospatial_lon_min" type="double" value="24.283333" />
  <attribute name="geospatial_lon_max" type="double" value="24.283333" />
  <attribute name="geospatial_vertical_min" type="double" value="181.0" />
  <attribute name="geospatial_vertical_max" type="double" value="181.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="time_coverage_start" value="2022-07-12T00:00:00 UTC" />
  <attribute name="time_coverage_end" value="2022-07-20T00:00:00 UTC" />
  <attribute name="time_coverage_duration" value="P0000-00-08T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-00T01:00:00" />
  <attribute name="timezone" value="UTC" />
  <attribute name="ebas_data_definition" value="EBAS_1.1" />
  <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="ebas_citation" value="Petäjä, T., CAMPAIGN, EMEP, GAW-WDCRG, 2024, Nitrogen oxides at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/WVN8-QAWX" />
  <attribute name="ebas_set_type_code" value="TU" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="WVN8-QAWX.nc" />
  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/WVN8-QAWX" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/WVN8-QAWX" />
  <attribute name="ebas_file_creation" value="2025-02-12T15:17:44.895771 UTC" />
  <attribute name="ebas_export_state" value="2025-02-12T10:45:41.316202 UTC" />
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  <attribute name="ebas_startdate" value="20220712000000" />
  <attribute name="ebas_revision_date" value="20240916103440" />
  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="8d" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_orig_time_res" value="6mn" />
  <attribute name="ebas_station_code" value="FI0050R" />
  <attribute name="ebas_platform_code" value="FI0050S" />
  <attribute name="ebas_station_name" value="Hyytiälä" />
  <attribute name="ebas_station_gaw_id" value="HYY" />
  <attribute name="ebas_station_state_province" value="Pirka" />
  <attribute name="ebas_station_land_use" value="Forest" />
  <attribute name="ebas_station_setting" value="Rural" />
  <attribute name="ebas_station_gaw_type" value="R" />
  <attribute name="ebas_station_wmo_region" value="6" />
  <attribute name="ebas_station_latitude" value="61.85" />
  <attribute name="ebas_station_longitude" value="24.283333" />
  <attribute name="ebas_station_altitude" value="181.0 m" />
  <attribute name="ebas_measurement_height" value="34.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="FI03L" />
  <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
  <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
  <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
  <attribute name="ebas_instrument_model" value="BLC+42iTL" />
  <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
  <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
  <attribute name="ebas_standard_method" value="None" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
  <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
  <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
  <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
  <attribute name="ebas_qa1_measure_id" value="ACTRIS NO round robin 2012" />
  <attribute name="ebas_qa1_date" value="2012-06-01 UTC" />
  <attribute name="ebas_qa1_document_name" value="WP4- NA4: Trace gases networking: Volatile organic carbon and nitrogen oxides Deliverable D4.4: Results of Round Robin exercise of NO" />
  <attribute name="ebas_qa1_document_url" value="http://fp7.actris.eu/Portals/97/deliverables/PU/WP4_D4.4_M24.pdf" />
  <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
  <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
  <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
  <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
  <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
  <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
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  <attribute name="Metadata_Conventions" value="Unidata Dataset Discovery v1.0" />
  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="comment" value="{&#xA;    &quot;Data definition&quot;: &quot;EBAS_1.1&quot;,&#xA;    &quot;Data license&quot;: &quot;https://creativecommons.org/licenses/by/4.0/&quot;,&#xA;    &quot;Citation&quot;: &quot;Petäjä, T., CAMPAIGN, EMEP, GAW-WDCRG, 2024, Nitrogen oxides at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/WVN8-QAWX&quot;,&#xA;    &quot;Set type code&quot;: &quot;TU&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;WVN8-QAWX.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/WVN8-QAWX&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/WVN8-QAWX&quot;,&#xA;    &quot;File creation&quot;: &quot;2025-02-12T15:17:44.895771 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2025-02-12T10:45:41.316202 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20220712000000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20240916103440&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;Initial revision, manually inspected&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;8d&quot;,&#xA;    &quot;Resolution code&quot;: &quot;1h&quot;,&#xA;    &quot;Sample duration&quot;: &quot;1h&quot;,&#xA;    &quot;Orig. time res.&quot;: &quot;6mn&quot;,&#xA;    &quot;Station code&quot;: &quot;FI0050R&quot;,&#xA;    &quot;Platform code&quot;: &quot;FI0050S&quot;,&#xA;    &quot;Station name&quot;: &quot;Hyytiälä&quot;,&#xA;    &quot;Station GAW-ID&quot;: &quot;HYY&quot;,&#xA;    &quot;Station state/province&quot;: &quot;Pirka&quot;,&#xA;    &quot;Station land use&quot;: &quot;Forest&quot;,&#xA;    &quot;Station setting&quot;: &quot;Rural&quot;,&#xA;    &quot;Station GAW type&quot;: &quot;R&quot;,&#xA;    &quot;Station WMO region&quot;: &quot;6&quot;,&#xA;    &quot;Station latitude&quot;: &quot;61.85&quot;,&#xA;    &quot;Station longitude&quot;: &quot;24.283333&quot;,&#xA;    &quot;Station altitude&quot;: &quot;181.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;34.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Matrix&quot;: &quot;air&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;FI03L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;chemiluminescence_photolytic&quot;,&#xA;    &quot;Instrument name&quot;: &quot;DMT_BLC_Thermo_42iTL_SMR&quot;,&#xA;    &quot;Instrument manufacturer&quot;: &quot;DMT+Thermo&quot;,&#xA;    &quot;Instrument model&quot;: &quot;BLC+42iTL&quot;,&#xA;    &quot;Instrument serial number&quot;: &quot;n/a+0335003694&quot;,&#xA;    &quot;Method ref&quot;: &quot;FI03L_Mastgas_IMP_2022&quot;,&#xA;    &quot;Standard method&quot;: &quot;None&quot;,&#xA;    &quot;Inlet type&quot;: &quot;Hat or hood&quot;,&#xA;    &quot;Inlet description&quot;: &quot;Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet&quot;,&#xA;    &quot;Ozone correction&quot;: &quot;Corrected for reaction with O3 in the inlet&quot;,&#xA;    &quot;Water vapor correction&quot;: &quot;Corrected for water vapor quenching in CLD&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;None&quot;,&#xA;    &quot;Humidity/temperature control description&quot;: &quot;Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature&quot;,&#xA;    &quot;Detection limit expl.&quot;: &quot;Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used&quot;,&#xA;    &quot;Zero/negative values code&quot;: &quot;Zero/negative possible&quot;,&#xA;    &quot;Zero/negative values&quot;: &quot;Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit&quot;,&#xA;    &quot;QA1 measure ID&quot;: &quot;ACTRIS NO round robin 2012&quot;,&#xA;    &quot;QA1 date&quot;: &quot;2012-06-01 UTC&quot;,&#xA;    &quot;QA1 document name&quot;: &quot;WP4- NA4: Trace gases networking: Volatile organic carbon and nitrogen oxides Deliverable D4.4: Results of Round Robin exercise of NO&quot;,&#xA;    &quot;QA1 document URL&quot;: &quot;http://fp7.actris.eu/Portals/97/deliverables/PU/WP4_D4.4_M24.pdf&quot;,&#xA;    &quot;Organization&quot;: &quot;FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;CAMPAIGN, EMEP, GAW-WDCRG&quot;,&#xA;    &quot;Framework name&quot;: &quot;, European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases&quot;,&#xA;    &quot;Framework description&quot;: &quot;, The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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.&quot;,&#xA;    &quot;Framework contact name&quot;: &quot;Wenche Aas, Kjetil Tørseth, Kjetil Tørseth&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;waa@nilu.no, kt@nilu.no, kt@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, \&quot;Division of Atmospheric Sciences, Department of Physics\&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland&quot;,&#xA;    &quot;Submitter&quot;: &quot;Keronen, Petri, , , , , , , , , &quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator&quot;&#xA;}" />
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  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="192" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="NOx_nmol_per_mol_amean_qc_flags" length="1" />
  <dimension name="NOx_ug_N_per_m3_amean_qc_flags" length="1" />
  <dimension name="NOx_nmol_per_mol_ExpUnc2s_qc_flags" length="1" />
  <dimension name="NOx_ug_N_per_m3_ExpUnc2s_qc_flags" length="1" />
  <dimension name="NOx_nmol_per_mol_prec1587_qc_flags" length="1" />
  <dimension name="NOx_ug_N_per_m3_prec1587_qc_flags" length="1" />
  <dimension name="NOx_nmol_per_mol_perc8413_qc_flags" length="1" />
  <dimension name="NOx_ug_N_per_m3_perc8413_qc_flags" length="1" />
  <dimension name="NOx_nmol_per_mol_precision_qc_flags" length="1" />
  <dimension name="NOx_ug_N_per_m3_precision_qc_flags" length="1" />
  <dimension name="NOx_nmol_per_mol_stddev_qc_flags" length="1" />
  <dimension name="NOx_ug_N_per_m3_stddev_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_nmol_per_mol_amean_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_ug_N_per_m3_amean_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_nmol_per_mol_ExpUnc2s_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_ug_N_per_m3_ExpUnc2s_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_nmol_per_mol_prec1587_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_ug_N_per_m3_prec1587_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_nmol_per_mol_perc8413_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_ug_N_per_m3_perc8413_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_nmol_per_mol_precision_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_ug_N_per_m3_precision_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_nmol_per_mol_stddev_qc_flags" length="1" />
  <dimension name="nitrogen_dioxide_ug_N_per_m3_stddev_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_nmol_per_mol_amean_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_ug_N_per_m3_amean_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_nmol_per_mol_ExpUnc2s_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_ug_N_per_m3_ExpUnc2s_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_nmol_per_mol_prec1587_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_ug_N_per_m3_prec1587_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_nmol_per_mol_perc8413_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_ug_N_per_m3_perc8413_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_nmol_per_mol_precision_qc_flags" length="1" />
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  <dimension name="nitrogen_monoxide_nmol_per_mol_stddev_qc_flags" length="1" />
  <dimension name="nitrogen_monoxide_ug_N_per_m3_stddev_qc_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2022-07-12T00:30:00Z" />
    <attribute name="time_coverage_end" value="2022-07-19T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3600.0" />
    <attribute name="time_coverage_duration" value="P0Y0M7DT23H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-04-15" />
    <attribute name="nciso_version" value="2.4.7" />
  </group>
  <variable name="time_bnds" shape="time tbnds" type="double">
    <attribute name="long_name" value="time bounds for measurement" />
  </variable>
  <variable name="metadata_time_bnds" shape="metadata_time tbnds" type="double">
    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
  </variable>
  <variable name="NOx_nmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nox_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="NOx_nmol_per_mol_amean_qc NOx_nmol_per_mol_amean_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="NOx_nmol_per_mol_amean_qc" shape="NOx_nmol_per_mol_amean_qc_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="NOx_nmol_per_mol_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_ug_N_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="NOx_ug N_per_m3_amean_qc NOx_ug N_per_m3_amean_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="NOx_ug_N_per_m3_amean_qc" shape="NOx_ug_N_per_m3_amean_qc_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="NOx_ug_N_per_m3_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_nmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nox_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="NOx_nmol_per_mol_ExpUnc2s_qc NOx_nmol_per_mol_ExpUnc2s_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600198. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.600198." />
  </variable>
  <variable name="NOx_nmol_per_mol_ExpUnc2s_qc" shape="NOx_nmol_per_mol_ExpUnc2s_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="NOx_nmol_per_mol_ExpUnc2s_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_ug_N_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="NOx_ug N_per_m3_ExpUnc2s_qc NOx_ug N_per_m3_ExpUnc2s_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228." />
  </variable>
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    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
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  <variable name="NOx_ug_N_per_m3_ExpUnc2s_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_nmol_per_mol_prec1587" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nox_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="NOx_nmol_per_mol_prec1587_qc NOx_nmol_per_mol_prec1587_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:15.87" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
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    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
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  <variable name="NOx_nmol_per_mol_prec1587_qc" shape="NOx_nmol_per_mol_prec1587_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_ug_N_per_m3_prec1587" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="NOx_ug N_per_m3_prec1587_qc NOx_ug N_per_m3_prec1587_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:15.87" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
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    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
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    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
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    <attribute name="ebas_framework_contact_name" value="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
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    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_nmol_per_mol_perc8413" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nox_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="NOx_nmol_per_mol_perc8413_qc NOx_nmol_per_mol_perc8413_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:84.13" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
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    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
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    <attribute name="ebas_laboratory_code" value="FI03L" />
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    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
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    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
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    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
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    <attribute name="ebas_framework_contact_name" value="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
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    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
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  <variable name="NOx_nmol_per_mol_perc8413_qc" shape="NOx_nmol_per_mol_perc8413_qc_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_ug_N_per_m3_perc8413" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="NOx_ug N_per_m3_perc8413_qc NOx_ug N_per_m3_perc8413_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
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    <attribute name="ebas_statistics" value="percentile:84.13" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
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    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="NOx_ug_N_per_m3_perc8413_qc" shape="NOx_ug_N_per_m3_perc8413_qc_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="NOx_ug_N_per_m3_perc8413_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_nmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nox_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="NOx_nmol_per_mol_precision_qc NOx_nmol_per_mol_precision_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600198. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.600198." />
  </variable>
  <variable name="NOx_nmol_per_mol_precision_qc" shape="NOx_nmol_per_mol_precision_qc_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="NOx_nmol_per_mol_precision_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_ug_N_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="NOx_ug N_per_m3_precision_qc NOx_ug N_per_m3_precision_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228." />
  </variable>
  <variable name="NOx_ug_N_per_m3_precision_qc" shape="NOx_ug_N_per_m3_precision_qc_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="NOx_ug_N_per_m3_precision_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_nmol_per_mol_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nox_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="NOx_nmol_per_mol_stddev_qc NOx_nmol_per_mol_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="NOx_nmol_per_mol_stddev_qc" shape="NOx_nmol_per_mol_stddev_qc_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="NOx_nmol_per_mol_stddev_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="NOx_ug_N_per_m3_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nox_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="NOx_ug N_per_m3_stddev_qc NOx_ug N_per_m3_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="NOx" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="NOx_ug_N_per_m3_stddev_qc" shape="NOx_ug_N_per_m3_stddev_qc_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="NOx_ug_N_per_m3_stddev_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_dioxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_nmol_per_mol_amean_qc nitrogen_dioxide_nmol_per_mol_amean_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL+GPT" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_amean_qc" shape="nitrogen_dioxide_nmol_per_mol_amean_qc_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="nitrogen_dioxide_nmol_per_mol_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_ug N_per_m3_amean_qc nitrogen_dioxide_ug N_per_m3_amean_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL+GPT" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_amean_qc" shape="nitrogen_dioxide_ug_N_per_m3_amean_qc_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="nitrogen_dioxide_ug_N_per_m3_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_dioxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_nmol_per_mol_ExpUnc2s_qc nitrogen_dioxide_nmol_per_mol_ExpUnc2s_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600198. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.600198." />
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_ug N_per_m3_ExpUnc2s_qc nitrogen_dioxide_ug N_per_m3_ExpUnc2s_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
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    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
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    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
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    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
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    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228." />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_dioxide_in_air" />
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    <attribute name="ancillary_variables" value="nitrogen_dioxide_nmol_per_mol_prec1587_qc nitrogen_dioxide_nmol_per_mol_prec1587_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
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    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_longitude" value="24.283333" />
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    <attribute name="ebas_regime" value="IMG" />
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    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
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    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="nitrogen_dioxide_ug_N_per_m3_prec1587" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
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    <attribute name="ebas_station_code" value="FI0050R" />
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    <attribute name="ebas_station_setting" value="Rural" />
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    <attribute name="ebas_station_longitude" value="24.283333" />
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    <attribute name="ebas_component" value="nitrogen_dioxide" />
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    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
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    <attribute name="ebas_framework_contact_name" value="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
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    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_dioxide_in_air" />
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    <attribute name="ebas_statistics" value="percentile:84.13" />
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    <attribute name="ebas_sample_duration" value="1h" />
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    <attribute name="ebas_station_code" value="FI0050R" />
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    <attribute name="ebas_station_name" value="Hyytiälä" />
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    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_perc8413_qc" shape="nitrogen_dioxide_nmol_per_mol_perc8413_qc_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="nitrogen_dioxide_nmol_per_mol_perc8413_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_perc8413" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_ug N_per_m3_perc8413_qc nitrogen_dioxide_ug N_per_m3_perc8413_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:84.13" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_perc8413_qc" shape="nitrogen_dioxide_ug_N_per_m3_perc8413_qc_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="nitrogen_dioxide_ug_N_per_m3_perc8413_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_dioxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_nmol_per_mol_precision_qc nitrogen_dioxide_nmol_per_mol_precision_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600198. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.600198." />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_precision_qc" shape="nitrogen_dioxide_nmol_per_mol_precision_qc_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="nitrogen_dioxide_nmol_per_mol_precision_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_ug N_per_m3_precision_qc nitrogen_dioxide_ug N_per_m3_precision_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228." />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_precision_qc" shape="nitrogen_dioxide_ug_N_per_m3_precision_qc_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="nitrogen_dioxide_ug_N_per_m3_precision_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_dioxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_nmol_per_mol_stddev_qc nitrogen_dioxide_nmol_per_mol_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_dioxide_nmol_per_mol_stddev_qc" shape="nitrogen_dioxide_nmol_per_mol_stddev_qc_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="nitrogen_dioxide_nmol_per_mol_stddev_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_ug N_per_m3_stddev_qc nitrogen_dioxide_ug N_per_m3_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_dioxide_ug_N_per_m3_stddev_qc" shape="nitrogen_dioxide_ug_N_per_m3_stddev_qc_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="nitrogen_dioxide_ug_N_per_m3_stddev_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_monoxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_nmol_per_mol_amean_qc nitrogen_monoxide_nmol_per_mol_amean_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_amean_qc" shape="nitrogen_monoxide_nmol_per_mol_amean_qc_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="nitrogen_monoxide_nmol_per_mol_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_amean_qc nitrogen_monoxide_ug N_per_m3_amean_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_amean_qc" shape="nitrogen_monoxide_ug_N_per_m3_amean_qc_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="nitrogen_monoxide_ug_N_per_m3_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_monoxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_nmol_per_mol_ExpUnc2s_qc nitrogen_monoxide_nmol_per_mol_ExpUnc2s_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600198. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.600198." />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_ExpUnc2s_qc" shape="nitrogen_monoxide_nmol_per_mol_ExpUnc2s_qc_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="nitrogen_monoxide_nmol_per_mol_ExpUnc2s_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_ExpUnc2s" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_ExpUnc2s_qc nitrogen_monoxide_ug N_per_m3_ExpUnc2s_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="expanded uncertainty 2sigma" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228." />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_ExpUnc2s_qc" shape="nitrogen_monoxide_ug_N_per_m3_ExpUnc2s_qc_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" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_ExpUnc2s_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_prec1587" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_monoxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_nmol_per_mol_prec1587_qc nitrogen_monoxide_nmol_per_mol_prec1587_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:15.87" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_prec1587_qc" shape="nitrogen_monoxide_nmol_per_mol_prec1587_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_prec1587_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_prec1587" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_prec1587_qc nitrogen_monoxide_ug N_per_m3_prec1587_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:15.87" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_prec1587_qc" shape="nitrogen_monoxide_ug_N_per_m3_prec1587_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="units" value="1" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_prec1587_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_perc8413" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_monoxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_nmol_per_mol_perc8413_qc nitrogen_monoxide_nmol_per_mol_perc8413_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:84.13" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_perc8413_qc" shape="nitrogen_monoxide_nmol_per_mol_perc8413_qc_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="nitrogen_monoxide_nmol_per_mol_perc8413_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_perc8413" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_perc8413_qc nitrogen_monoxide_ug N_per_m3_perc8413_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="percentile:84.13" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_perc8413_qc" shape="nitrogen_monoxide_ug_N_per_m3_perc8413_qc_flags time" type="int">
    <attribute name="units" value="1" />
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    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_perc8413_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_monoxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_nmol_per_mol_precision_qc nitrogen_monoxide_nmol_per_mol_precision_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600198. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.600198." />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_precision_qc" shape="nitrogen_monoxide_nmol_per_mol_precision_qc_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="nitrogen_monoxide_nmol_per_mol_precision_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_precision" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_precision_qc nitrogen_monoxide_ug N_per_m3_precision_ebasmetadata" />
    <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="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="precision" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.6249228." />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_precision_qc" shape="nitrogen_monoxide_ug_N_per_m3_precision_qc_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="nitrogen_monoxide_ug_N_per_m3_precision_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_nitrogen_monoxide_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_nmol_per_mol_stddev_qc nitrogen_monoxide_nmol_per_mol_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <attribute name="ebas_detection_limit" value="0.06 nmol/mol" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.60020. Detection limit converted from '0.0375 ug N/m3' at 273.15 K, 1013.25 hPa to '0.06 nmol/mol', conversion factor 1.60020." />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_stddev_qc" shape="nitrogen_monoxide_nmol_per_mol_stddev_qc_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="nitrogen_monoxide_nmol_per_mol_stddev_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_stddev_qc nitrogen_monoxide_ug N_per_m3_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20240916103440" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="6mn" />
    <attribute name="ebas_station_code" value="FI0050R" />
    <attribute name="ebas_platform_code" value="FI0050S" />
    <attribute name="ebas_station_name" value="Hyytiälä" />
    <attribute name="ebas_station_gaw_id" value="HYY" />
    <attribute name="ebas_station_state_province" value="Pirka" />
    <attribute name="ebas_station_land_use" value="Forest" />
    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="6" />
    <attribute name="ebas_station_latitude" value="61.85" />
    <attribute name="ebas_station_longitude" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="34.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
    <attribute name="ebas_instrument_name" value="DMT_BLC_Thermo_42iTL_SMR" />
    <attribute name="ebas_instrument_manufacturer" value="DMT+Thermo" />
    <attribute name="ebas_instrument_model" value="BLC+42iTL" />
    <attribute name="ebas_instrument_serial_number" value="n/a+0335003694" />
    <attribute name="ebas_method_ref" value="FI03L_Mastgas_IMP_2022" />
    <attribute name="ebas_standard_method" value="None" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Inlet protected against rain with indented and downward inclined apertures in a machined piece of a PTFE rod; 157 m long sample line of 16/14 mm diam. PTFE tube; flow rate 45 l/min; 5 um PTFE filters at analyser inlet" />
    <attribute name="ebas_ozone_correction" value="Corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Corrected for water vapor quenching in CLD" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Outdoors inlet + line heated at 5 C above air temperature; Indoors passive heating from atmospheric to lab temperature" />
    <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="0.0375 ug N/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations and calibration uncertainty below the detection limit" />
    <attribute name="ebas_organization" value="FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value=", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value=", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., 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="Wenche Aas, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, &quot;Division of Atmospheric Sciences, Department of Physics&quot;, PO BOX 64, , FI-00014, University of Helsinki, Finland" />
    <attribute name="ebas_submitter" value="Keronen, Petri, , , , , , , , , " />
    <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: CAMPAIGN, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Quenching in CLD caused by water vapour and artefacts caused by reaction with ozone in the inlet corrected for. Baseline correction due to instrumental offset corrected for. -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.624923." />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_stddev_qc" shape="nitrogen_monoxide_ug_N_per_m3_stddev_qc_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="nitrogen_monoxide_ug_N_per_m3_stddev_ebasmetadata" 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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
</netcdf>
