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  <attribute name="title" value="OC/EC at Utö" />
  <attribute name="summary" value="OC/EC at Utö. These measurements are gathered as a part of the following projects ACTRIS, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['pressure in pm25 (air_pressure)', 'temperature in pm25 (air_temperature)', 'elemental_carbon in pm25 (mass_concentration_of_elemental_carbon_in_pm2p5_in_air)', 'organic_carbon in pm25 (mass_concentration_of_organic_carbon_in_pm2p5_in_air)', 'total_carbon in pm25 (mass_concentration_of_total_carbon_in_pm2p5_in_air)']" />
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  <attribute name="project" value="ACTRIS, EMEP" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/K6PT-V7BJ" />
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  <attribute name="citation" value="Aurela, M., ACTRIS, EMEP, 2026, OC/EC at Utö, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/K6PT-V7BJ" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FI01L &quot;Finnish Meteorological Institute&quot; FMI/IKO &quot;Atmospheric Composition Unit (IKO)&quot; &quot;Erik Palménin aukio&quot; FI-00560 Helsinki Finland" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-05-27T20:33:26.289560Z" />
  <attribute name="date_metadata_modified" value="2026-02-17T11:00:00Z" />
  <attribute name="creator_name" value="Minna Aurela" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="Minna Aurela" />
  <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 (21.377222 59.779167 7)" />
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  <attribute name="time_coverage_start" value="2022-12-31T22:30:00Z" />
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  <attribute name="time_coverage_resolution" value="P0000-00-00T11:00:00" />
  <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="Aurela, M., ACTRIS, EMEP, 2026, OC/EC at Utö, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/K6PT-V7BJ" />
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  <attribute name="ebas_startdate" value="2022-12-31T22:30:00.000000Z" />
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  <attribute name="ebas_version_description" value="initial revision, manually inspected" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="3y" />
  <attribute name="ebas_resolution_code" value="11h" />
  <attribute name="ebas_sample_duration" value="11h" />
  <attribute name="ebas_orig_time_res" value="11h" />
  <attribute name="ebas_station_code" value="FI0009R" />
  <attribute name="ebas_platform_code" value="FI0009S" />
  <attribute name="ebas_station_name" value="Utö" />
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  <attribute name="ebas_station_longitude" type="double" value="21.377222" />
  <attribute name="ebas_station_altitude" value="7.0 m" />
  <attribute name="ebas_measurement_latitude" type="double" value="59.779167" />
  <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
  <attribute name="ebas_measurement_altitude" value="7.0 m" />
  <attribute name="ebas_measurement_height" value="4.5 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_matrix" value="pm25" />
  <attribute name="ebas_laboratory_code" value="FI01L" />
  <attribute name="ebas_instrument_type" value="online_thermal-optical_analysis" />
  <attribute name="ebas_instrument_name" value="SC-OCEC_RT3182" />
  <attribute name="ebas_instrument_manufacturer" value="Sunset Laboratory" />
  <attribute name="ebas_instrument_model" value="Model-4 Semi-Continuous Field Analyzer" />
  <attribute name="ebas_instrument_serial_number" value="3182" />
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  <attribute name="ebas_inlet_type" value="Cyclone" />
  <attribute name="ebas_inlet_description" value="with rain hat" />
  <attribute name="ebas_flow_rate" value="8.0 l/min" />
  <attribute name="ebas_filter_face_velocity" value="104.0 cm/s" />
  <attribute name="ebas_exposed_filter_area" value="1.29 cm2" />
  <attribute name="ebas_filter_description" value="Circular 17 mm diameter punches cut from Pallflex 47mm, inner diameter of the insert tool 1.65 cm" />
  <attribute name="ebas_medium" value="Quartz" />
  <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
  <attribute name="ebas_filter_conditioning" value="None" />
  <attribute name="ebas_sample_preparation" value="None" />
  <attribute name="ebas_blank_correction" value="Not blank corrected" />
  <attribute name="ebas_artifact_correction" value="Positive only" />
  <attribute name="ebas_artifact_correction_description" value="Carbon parallel-plate diffusion denuder (from Sunset Lab.)," />
  <attribute name="ebas_charring_correction" value="By laser transmission" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_volume_std_temperature" value="ambient" />
  <attribute name="ebas_volume_std_pressure" value="ambient" />
  <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of instrument blanks" />
  <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
  <attribute name="ebas_organization" value="FI01L, Finnish Meteorological Institute, FMI/IKO, Atmospheric Composition Unit (IKO), Erik Palménin aukio, , FI-00560, Helsinki, Finland" />
  <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP" />
  <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme" />
  <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The 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." />
  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
  <attribute name="ebas_submitter" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
  <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP. Request acknowledgement details from data originator" />
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  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="standard_name_vocabulary" value="CF-1.7, ACDD-1.3" />
  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="time" length="2192" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="3" />
  <dimension name="qc_pressure_flags" length="1" />
  <dimension name="qc_temperature_flags" length="1" />
  <dimension name="qc_elemental_carbon_amean_flags" length="1" />
  <dimension name="qc_elemental_carbon_uncertainty_flags" length="1" />
  <dimension name="qc_organic_carbon_amean_flags" length="1" />
  <dimension name="qc_organic_carbon_uncertainty_flags" length="1" />
  <dimension name="d_Fraction" length="5" />
  <dimension name="qc_organic_carbon_amean_d_Fraction_flags" length="1" />
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    <attribute name="time_coverage_start" value="2023-01-01T04:00:00Z" />
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    <attribute name="time_coverage_units" value="seconds" />
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    <attribute name="metadata_creation" value="2026-06-26" />
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    <attribute name="long_name" value="time bounds for measurement" />
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  <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="v_pressure" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="air_pressure" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="hPa" />
    <attribute name="ancillary_variables" value="qc_pressure meta_pressure" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-02-17T11:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_station_name" value="Utö" />
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    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="pressure" />
    <attribute name="ebas_unit" value="hPa" />
    <attribute name="ebas_matrix" value="pm25" />
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    <attribute name="ebas_inlet_type" value="Cyclone" />
    <attribute name="ebas_inlet_description" value="with rain hat" />
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    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_artifact_correction_description" value="Carbon parallel-plate diffusion denuder (from Sunset Lab.)," />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of instrument blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="standard_name" value="air_temperature" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="K" />
    <attribute name="ancillary_variables" value="qc_temperature meta_temperature" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-02-17T11:00:00.000000Z" />
    <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="11h" />
    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
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    <attribute name="ebas_station_name" value="Utö" />
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    <attribute name="ebas_station_longitude" type="double" value="21.377222" />
    <attribute name="ebas_station_altitude" value="7.0 m" />
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    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
    <attribute name="ebas_measurement_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="temperature" />
    <attribute name="ebas_unit" value="K" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="FI01L" />
    <attribute name="ebas_instrument_type" value="online_thermal-optical_analysis" />
    <attribute name="ebas_instrument_name" value="SC-OCEC_RT3182" />
    <attribute name="ebas_instrument_manufacturer" value="Sunset Laboratory" />
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    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Cyclone" />
    <attribute name="ebas_inlet_description" value="with rain hat" />
    <attribute name="ebas_flow_rate" value="8.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="104.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="1.29 cm2" />
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    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_artifact_correction_description" value="Carbon parallel-plate diffusion denuder (from Sunset Lab.)," />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of instrument blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="FI01L, Finnish Meteorological Institute, FMI/IKO, Atmospheric Composition Unit (IKO), Erik Palménin aukio, , FI-00560, Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The 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." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP. Request acknowledgement details from data originator" />
  </variable>
  <variable name="qc_temperature" shape="qc_temperature_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
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  </variable>
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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="mass_concentration_of_elemental_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_elemental_carbon_amean meta_elemental_carbon_amean" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-02-17T11:00:00.000000Z" />
    <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="11h" />
    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
    <attribute name="ebas_platform_code" value="FI0009S" />
    <attribute name="ebas_station_name" value="Utö" />
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    <attribute name="ebas_station_longitude" type="double" value="21.377222" />
    <attribute name="ebas_station_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="59.779167" />
    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
    <attribute name="ebas_measurement_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="elemental_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
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    <attribute name="ebas_instrument_serial_number" value="3182" />
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    <attribute name="ebas_inlet_description" value="with rain hat" />
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    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
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    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
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    <attribute name="ebas_artifact_correction_description" value="Carbon parallel-plate diffusion denuder (from Sunset Lab.)," />
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    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleelementalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle elemental carbon mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
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    <attribute name="actris_constraints_preferred_term" value="expressed as carbon, elemental" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
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    <attribute name="actris_temporal_resolution" value="PT11H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_elemental_carbon_amean" shape="qc_elemental_carbon_amean_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" />
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  <variable name="meta_elemental_carbon_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_elemental_carbon_uncertainty" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_elemental_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
    <attribute name="ebas_platform_code" value="FI0009S" />
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    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
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    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="elemental_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
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    <attribute name="ebas_inlet_description" value="with rain hat" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleorganiccarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle organic carbon mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
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    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
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  <variable name="qc_organic_carbon_amean" shape="qc_organic_carbon_amean_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" />
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  <variable name="meta_organic_carbon_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_organic_carbon_uncertainty" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm2p5_in_air" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="11h" />
    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
    <attribute name="ebas_platform_code" value="FI0009S" />
    <attribute name="ebas_station_name" value="Utö" />
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    <attribute name="ebas_station_longitude" type="double" value="21.377222" />
    <attribute name="ebas_station_altitude" value="7.0 m" />
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    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
    <attribute name="ebas_measurement_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="FI01L" />
    <attribute name="ebas_instrument_type" value="online_thermal-optical_analysis" />
    <attribute name="ebas_instrument_name" value="SC-OCEC_RT3182" />
    <attribute name="ebas_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_instrument_model" value="Model-4 Semi-Continuous Field Analyzer" />
    <attribute name="ebas_instrument_serial_number" value="3182" />
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    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Cyclone" />
    <attribute name="ebas_inlet_description" value="with rain hat" />
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    <attribute name="ebas_exposed_filter_area" value="1.29 cm2" />
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    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_artifact_correction_description" value="Carbon parallel-plate diffusion denuder (from Sunset Lab.)," />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
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    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of instrument blanks" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleorganiccarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle organic carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM2.5" />
    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/thermo-opticalanalyser-online" />
    <attribute name="actris_instrument_type_preferred_term" value="thermo-optical analyser, online" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, EMEP" />
    <attribute name="actris_temporal_resolution" value="PT11H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_organic_carbon_uncertainty" shape="qc_organic_carbon_uncertainty_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_organic_carbon_uncertainty" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_organic_carbon_amean_d_Fraction" shape="d_Fraction time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_organic_carbon_amean_d_Fraction meta_organic_carbon_amean_d_Fraction" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-02-17T11:00:00.000000Z" />
    <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="11h" />
    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
    <attribute name="ebas_platform_code" value="FI0009S" />
    <attribute name="ebas_station_name" value="Utö" />
    <attribute name="ebas_station_latitude" type="double" value="59.779167" />
    <attribute name="ebas_station_longitude" type="double" value="21.377222" />
    <attribute name="ebas_station_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="59.779167" />
    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
    <attribute name="ebas_measurement_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="FI01L" />
    <attribute name="ebas_instrument_type" value="online_thermal-optical_analysis" />
    <attribute name="ebas_instrument_name" value="SC-OCEC_RT3182" />
    <attribute name="ebas_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_instrument_model" value="Model-4 Semi-Continuous Field Analyzer" />
    <attribute name="ebas_instrument_serial_number" value="3182" />
    <attribute name="ebas_method_ref" value="FI01L_thermal-optical_analysis_EUSAAR_2" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Cyclone" />
    <attribute name="ebas_inlet_description" value="with rain hat" />
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    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
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    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of instrument blanks" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="FI01L, Finnish Meteorological Institute, FMI/IKO, Atmospheric Composition Unit (IKO), Erik Palménin aukio, , FI-00560, Helsinki, Finland" />
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    <attribute name="actris_variable_preferred_term" value="aerosol particle organic carbon mass concentration" />
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  <variable name="qc_organic_carbon_amean_d_Fraction" shape="d_Fraction qc_organic_carbon_amean_d_Fraction_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="meta_organic_carbon_amean_d_Fraction" shape="d_Fraction metadata_time" type="String">
    <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="mass_concentration_of_total_carbon_in_pm2p5_in_air" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-02-17T11:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
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    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="11h" />
    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
    <attribute name="ebas_platform_code" value="FI0009S" />
    <attribute name="ebas_station_name" value="Utö" />
    <attribute name="ebas_station_latitude" type="double" value="59.779167" />
    <attribute name="ebas_station_longitude" type="double" value="21.377222" />
    <attribute name="ebas_station_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="59.779167" />
    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
    <attribute name="ebas_measurement_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="total_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="FI01L" />
    <attribute name="ebas_instrument_type" value="online_thermal-optical_analysis" />
    <attribute name="ebas_instrument_name" value="SC-OCEC_RT3182" />
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    <attribute name="ebas_inlet_description" value="with rain hat" />
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    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
    <attribute name="ebas_filter_conditioning" value="None" />
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    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_originator" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticletotalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle total carbon mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
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    <attribute name="actris_instrument_type_preferred_term" value="thermo-optical analyser, online" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, EMEP" />
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    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="qc_total_carbon_amean" shape="qc_total_carbon_amean_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="meta_total_carbon_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_total_carbon_uncertainty" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_total_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_total_carbon_uncertainty meta_total_carbon_uncertainty" />
    <attribute name="cell_methods" value="time: uncertainty" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-02-17T11:00:00.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="11h" />
    <attribute name="ebas_orig_time_res" value="11h" />
    <attribute name="ebas_station_code" value="FI0009R" />
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    <attribute name="ebas_station_name" value="Utö" />
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    <attribute name="ebas_station_longitude" type="double" value="21.377222" />
    <attribute name="ebas_station_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="59.779167" />
    <attribute name="ebas_measurement_longitude" type="double" value="21.377222" />
    <attribute name="ebas_measurement_altitude" value="7.0 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="total_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="FI01L" />
    <attribute name="ebas_instrument_type" value="online_thermal-optical_analysis" />
    <attribute name="ebas_instrument_name" value="SC-OCEC_RT3182" />
    <attribute name="ebas_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_instrument_model" value="Model-4 Semi-Continuous Field Analyzer" />
    <attribute name="ebas_instrument_serial_number" value="3182" />
    <attribute name="ebas_method_ref" value="FI01L_thermal-optical_analysis_EUSAAR_2" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Cyclone" />
    <attribute name="ebas_inlet_description" value="with rain hat" />
    <attribute name="ebas_flow_rate" value="8.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="104.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="1.29 cm2" />
    <attribute name="ebas_filter_description" value="Circular 17 mm diameter punches cut from Pallflex 47mm, inner diameter of the insert tool 1.65 cm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="Prefired by previous analysis" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_artifact_correction_description" value="Carbon parallel-plate diffusion denuder (from Sunset Lab.)," />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of instrument blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="FI01L, Finnish Meteorological Institute, FMI/IKO, Atmospheric Composition Unit (IKO), Erik Palménin aukio, , FI-00560, Helsinki, Finland" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, The 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." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Aurela, Minna, , , , , , , , , &quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticletotalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle total carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM2.5" />
    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/thermo-opticalanalyser-online" />
    <attribute name="actris_instrument_type_preferred_term" value="thermo-optical analyser, online" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, EMEP" />
    <attribute name="actris_temporal_resolution" value="PT11H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_total_carbon_uncertainty" shape="qc_total_carbon_uncertainty_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_total_carbon_uncertainty" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="time" shape="time" type="double">
    <attribute name="long_name" value="time of measurement" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="standard" />
    <attribute name="bounds" value="time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="metadata_time" shape="metadata_time" type="double">
    <attribute name="long_name" value="time of ebas metadata intervals" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="standard" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="d_Fraction" shape="d_Fraction" type="String" />
</netcdf>
