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  <attribute name="title" value="Nitrogen_dioxide at Hyytiälä" />
  <attribute name="summary" value="Nitrogen_dioxide at Hyytiälä. These measurements are gathered as a part of the following projects ACTRIS, EMEP, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['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)']" />
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  <attribute name="id" value="NJC2-AJMW.nc" />
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  <attribute name="project" value="ACTRIS, 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: ACTRIS, EMEP, GAW-WDCRG." />
  <attribute name="doi" value="https://doi.org/10.48597/NJC2-AJMW" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Petäjä, T., Petri, K., ACTRIS, EMEP, GAW-WDCRG, 2026, Nitrogen_dioxide at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/NJC2-AJMW" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FI03L &quot;University of Helsinki&quot; UHEL &quot;Institute for Atmospheric and Earth System Research (INAR)&quot; &quot;PO BOX 64&quot; FI-00014 &quot;University of Helsinki&quot; Finland" />
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  <attribute name="date_created" value="2026-08-25T11:13:24.309102Z" />
  <attribute name="date_metadata_modified" value="2026-06-05T00:00:00Z" />
  <attribute name="creator_name" value="Tuukka Petäjä, Keronen Petri" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="tuukka.petaja@helsinki.fi, petri.keronen@helsinki.fi" />
  <attribute name="creator_institution" value="&quot;University of Helsinki, Institute for Atmospheric and Earth System Research, UHEL&quot;, &quot;University of Helsinki, Institute for Atmospheric and Earth System Research (INAR), UHEL&quot;" />
  <attribute name="contributor_name" value="Keronen Petri, Derek Hageman" />
  <attribute name="contributor_role" value="data submitter, data submitter" />
  <attribute name="publisher_type" value="institution" />
  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (24.283333 61.85 181)" />
  <attribute name="geospatial_lat_min" type="double" value="61.85" />
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  <attribute name="time_coverage_start" value="2023-01-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2023-08-22T12:00:00Z" />
  <attribute name="time_coverage_duration" value="P0000-07-21T12:00:00" />
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  <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., Petri, K., ACTRIS, EMEP, GAW-WDCRG, 2026, Nitrogen_dioxide at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/NJC2-AJMW" />
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  <attribute name="ebas_startdate" value="2023-01-01T00:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2026-06-05T00:00:00.000000Z" />
  <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="8mo" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_orig_time_res" value="1mn" />
  <attribute name="ebas_station_code" value="FI0050R" />
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  <attribute name="ebas_station_name" value="Hyytiälä" />
  <attribute name="ebas_station_gaw_id" value="SMR" />
  <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" type="long" value="6" />
  <attribute name="ebas_station_latitude" type="double" value="61.85" />
  <attribute name="ebas_station_longitude" type="double" value="24.283333" />
  <attribute name="ebas_station_altitude" value="181.0 m" />
  <attribute name="ebas_measurement_height" value="35.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="nitrogen_dioxide" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="FI03L" />
  <attribute name="ebas_instrument_type" value="OA-ICOS" />
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  <attribute name="ebas_instrument_serial_number" value="15-0026" />
  <attribute name="ebas_method_ref" value="FI03L_OA-ICOS_Towergas_DE20L_NOx_corr_offset" />
  <attribute name="ebas_inlet_type" value="Downward-facing tube" />
  <attribute name="ebas_inlet_description" value="Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments." />
  <attribute name="ebas_inlet_tube_material" value="PFA" />
  <attribute name="ebas_ozone_correction" value="Not corrected for reaction with O3 in the inlet" />
  <attribute name="ebas_water_vapor_correction" value="Not applicable as calibrated at ambient humidity" />
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  <attribute name="ebas_humidity_temperaure_control_description" value="indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C" />
  <attribute name="ebas_detection_limit_expl" value="Estimated from signal standard deviation when sampling zero air by taking 2 times precision (standard deviation) of instrument signal" />
  <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="ACTRIS, EMEP, GAW-WDCRG" />
  <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, World Data Centre for Reactive Gases" />
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  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland&quot;, &quot;Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904&quot;" />
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  <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG." />
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  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="time" length="5604" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="qc_nitrogen_dioxide_nmol_per_mol_amean_flags" length="1" />
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  <dimension name="qc_nitrogen_dioxide_ug_N_per_m3_det_lim_flags" length="1" />
  <dimension name="qc_nitrogen_dioxide_nmol_per_mol_ExpUnc2s_flags" length="1" />
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  <dimension name="qc_nitrogen_dioxide_ug_N_per_m3_prec1587_flags" length="1" />
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    <attribute name="time_coverage_start" value="2023-01-01T00:30:00Z" />
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    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_station_wmo_region" type="long" value="6" />
    <attribute name="ebas_station_latitude" type="double" value="61.85" />
    <attribute name="ebas_station_longitude" type="double" value="24.283333" />
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    <attribute name="ebas_measurement_height" value="35.0 m" />
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    <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" />
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    <attribute name="ebas_instrument_serial_number" value="15-0026" />
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    <attribute name="ebas_inlet_description" value="Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments." />
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    <attribute name="ebas_water_vapor_correction" value="Not applicable as calibrated at ambient humidity" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG." />
    <attribute name="ebas_comment" value="converted by TC from FI0050R.20230104130111.20260316083430.OA-ICOS.nitrogen_dioxide.air.1y.9mn.FI03L_LosGatosResearch_NO2analyzer_hyytiala.FI03L_Towergas.lev1.nas ,precision, uncertainty, dectection limit as in lev1 -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492281." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitrogendioxidemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="nitrogen dioxide mass concentration" />
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    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen" />
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  <variable name="qc_nitrogen_dioxide_ug_N_per_m3_amean" shape="qc_nitrogen_dioxide_ug_N_per_m3_amean_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_nitrogen_dioxide_nmol_per_mol_det_lim" 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="qc_nitrogen_dioxide_nmol_per_mol_det_lim meta_nitrogen_dioxide_nmol_per_mol_det_lim" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-06-05T00:00:00.000000Z" />
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    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="detection limit" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
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    <attribute name="ebas_station_state_province" value="Pirka" />
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    <attribute name="ebas_station_setting" value="Rural" />
    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_latitude" type="double" value="61.85" />
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    <attribute name="ebas_component" value="nitrogen_dioxide" />
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    <attribute name="ebas_laboratory_code" value="FI03L" />
    <attribute name="ebas_instrument_type" value="OA-ICOS" />
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    <attribute name="ebas_inlet_description" value="Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments." />
    <attribute name="ebas_inlet_tube_material" value="PFA" />
    <attribute name="ebas_ozone_correction" value="Not corrected for reaction with O3 in the inlet" />
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    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="actris_variable_preferred_term" value="nitrogen dioxide amount fraction" />
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    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_nitrogen_dioxide_ug_N_per_m3_det_lim" 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="qc_nitrogen_dioxide_ug_N_per_m3_det_lim meta_nitrogen_dioxide_ug_N_per_m3_det_lim" />
    <attribute name="cell_methods" value="time: detection limit" />
    <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="1mn" />
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    <attribute name="ebas_comment" value="converted by TC from FI0050R.20230104130111.20260316083430.OA-ICOS.nitrogen_dioxide.air.1y.9mn.FI03L_LosGatosResearch_NO2analyzer_hyytiala.FI03L_Towergas.lev1.nas ,precision, uncertainty, dectection limit as in lev1 -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492281." />
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    <attribute name="missing_value" type="double" value="NaN" />
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    <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="OA-ICOS" />
    <attribute name="ebas_instrument_name" value="LosGatosResearch_NO2analyzer_hyytiala" />
    <attribute name="ebas_instrument_manufacturer" value="Los Gatos Research" />
    <attribute name="ebas_instrument_model" value="NO2 analyzer" />
    <attribute name="ebas_instrument_serial_number" value="15-0026" />
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    <attribute name="ebas_inlet_type" value="Downward-facing tube" />
    <attribute name="ebas_inlet_description" value="Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments." />
    <attribute name="ebas_inlet_tube_material" value="PFA" />
    <attribute name="ebas_ozone_correction" value="Not corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Not applicable as calibrated at ambient humidity" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C" />
    <attribute name="ebas_detection_limit_expl" value="Estimated from signal standard deviation when sampling zero air by taking 2 times precision (standard deviation) of instrument signal" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland&quot;, &quot;Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904&quot;" />
    <attribute name="ebas_submitter" value="&quot;Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904&quot;, &quot;Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland&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, GAW-WDCRG." />
    <attribute name="ebas_comment" value="converted by TC from FI0050R.20230104130111.20260316083430.OA-ICOS.nitrogen_dioxide.air.1y.9mn.FI03L_LosGatosResearch_NO2analyzer_hyytiala.FI03L_Towergas.lev1.nas ,precision, uncertainty, dectection limit as in lev1 -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492281. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.6001976." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitrogendioxideamountfraction" />
    <attribute name="actris_variable_preferred_term" value="nitrogen dioxide amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_timeliness_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/scheduled" />
    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/off-axisintegratedcavityoutputspectrometer" />
    <attribute name="actris_instrument_type_preferred_term" value="off-axis integrated cavity output spectrometer" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, EMEP, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_nitrogen_dioxide_nmol_per_mol_stddev" shape="qc_nitrogen_dioxide_nmol_per_mol_stddev_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_nitrogen_dioxide_nmol_per_mol_stddev" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_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="qc_nitrogen_dioxide_ug_N_per_m3_stddev meta_nitrogen_dioxide_ug_N_per_m3_stddev" />
    <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="2026-06-05T00:00:00.000000Z" />
    <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="1mn" />
    <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="SMR" />
    <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" type="long" value="6" />
    <attribute name="ebas_station_latitude" type="double" value="61.85" />
    <attribute name="ebas_station_longitude" type="double" value="24.283333" />
    <attribute name="ebas_station_altitude" value="181.0 m" />
    <attribute name="ebas_measurement_height" value="35.0 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="OA-ICOS" />
    <attribute name="ebas_instrument_name" value="LosGatosResearch_NO2analyzer_hyytiala" />
    <attribute name="ebas_instrument_manufacturer" value="Los Gatos Research" />
    <attribute name="ebas_instrument_model" value="NO2 analyzer" />
    <attribute name="ebas_instrument_serial_number" value="15-0026" />
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    <attribute name="ebas_inlet_type" value="Downward-facing tube" />
    <attribute name="ebas_inlet_description" value="Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments." />
    <attribute name="ebas_inlet_tube_material" value="PFA" />
    <attribute name="ebas_ozone_correction" value="Not corrected for reaction with O3 in the inlet" />
    <attribute name="ebas_water_vapor_correction" value="Not applicable as calibrated at ambient humidity" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit_expl" value="Estimated from signal standard deviation when sampling zero air by taking 2 times precision (standard deviation) of instrument signal" />
    <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="ACTRIS, EMEP, GAW-WDCRG" />
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    <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., 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." />
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    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland&quot;, &quot;Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904&quot;" />
    <attribute name="ebas_submitter" value="&quot;Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904&quot;, &quot;Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland&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, GAW-WDCRG." />
    <attribute name="ebas_comment" value="converted by TC from FI0050R.20230104130111.20260316083430.OA-ICOS.nitrogen_dioxide.air.1y.9mn.FI03L_LosGatosResearch_NO2analyzer_hyytiala.FI03L_Towergas.lev1.nas ,precision, uncertainty, dectection limit as in lev1 -- Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492281." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitrogendioxidemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="nitrogen dioxide mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen" />
    <attribute name="actris_constraints_preferred_term" value="expressed as nitrogen" />
    <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/off-axisintegratedcavityoutputspectrometer" />
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    <attribute name="actris_framework_preferred_term" value="ACTRIS, EMEP, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_nitrogen_dioxide_ug_N_per_m3_stddev" shape="qc_nitrogen_dioxide_ug_N_per_m3_stddev_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_nitrogen_dioxide_ug_N_per_m3_stddev" 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" />
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