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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Nitrogen_dioxide at Rucava" />
  <attribute name="summary" value="Nitrogen_dioxide at Rucava. These measurements are gathered as a part of the following projects EMEP, GAW-WDCA, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air)']" />
  <attribute name="keywords" value="Rucava LV0010R nitrogen_dioxide air EMEP GAW-WDCA GAW-WDCRG mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
  <attribute name="id" value="AZ75-PV5W.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="EMEP, GAW-WDCA, GAW-WDCRG" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/AZ75-PV5W" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Indriksone, I., EMEP, GAW-WDCA, GAW-WDCRG, 2024, Nitrogen_dioxide at Rucava, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/AZ75-PV5W" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="LV33L &quot;Latvian Environment, Geology and Meteorology Centre&quot; &quot;Monitoring  Department&quot; &quot;Maskavas Str. 165&quot; LV-1019 Riga Latvia" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2024-06-18T14:44:37.531897Z" />
  <attribute name="date_metadata_modified" value="2024-06-18T14:44:37Z" />
  <attribute name="creator_name" value="Iveta Indriksone" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="Marina Frolova" />
  <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 (21.173056 56.161944 18)" />
  <attribute name="geospatial_lat_min" type="double" value="56.161944" />
  <attribute name="geospatial_lat_max" type="double" value="56.161944" />
  <attribute name="geospatial_lon_min" type="double" value="21.173056" />
  <attribute name="geospatial_lon_max" type="double" value="21.173056" />
  <attribute name="geospatial_vertical_min" type="double" value="18.0" />
  <attribute name="geospatial_vertical_max" type="double" value="18.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2017-01-01T08:00:00Z" />
  <attribute name="time_coverage_end" value="2020-01-01T08:00:00Z" />
  <attribute name="time_coverage_duration" value="P0003-00-00T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-01T00:00:00" />
  <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="Indriksone, I., EMEP, GAW-WDCA, GAW-WDCRG, 2024, Nitrogen_dioxide at Rucava, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/AZ75-PV5W" />
  <attribute name="ebas_set_type_code" value="TU" />
  <attribute name="ebas_timezone" value="UTC" />
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  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/AZ75-PV5W" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/AZ75-PV5W" />
  <attribute name="ebas_file_creation" value="2026-06-11T18:37:02.423775Z" />
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  <attribute name="ebas_startdate" value="2017-01-01T08:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2024-06-18T14:44:37.531897Z" />
  <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_period_code" value="3y" />
  <attribute name="ebas_resolution_code" value="1d" />
  <attribute name="ebas_sample_duration" value="1d" />
  <attribute name="ebas_orig_time_res" value="1d" />
  <attribute name="ebas_station_code" value="LV0010R" />
  <attribute name="ebas_platform_code" value="LV0010S" />
  <attribute name="ebas_station_name" value="Rucava" />
  <attribute name="ebas_station_latitude" type="double" value="56.161944" />
  <attribute name="ebas_station_longitude" type="double" value="21.173056" />
  <attribute name="ebas_station_altitude" value="18.0 m" />
  <attribute name="ebas_measurement_altitude" value="18.0 m" />
  <attribute name="ebas_measurement_height" value="1.8 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="LV33L" />
  <attribute name="ebas_instrument_type" value="glass_sinter" />
  <attribute name="ebas_instrument_name" value="gls_d_0010" />
  <attribute name="ebas_instrument_manufacturer" value="Werner-Glas &amp; Instrument AB" />
  <attribute name="ebas_instrument_model" value="FK" />
  <attribute name="ebas_instrument_serial_number" value="96025" />
  <attribute name="ebas_analytical_laboratory_code" value="LV33L" />
  <attribute name="ebas_analytical_measurement_technique" value="spectrophotometric" />
  <attribute name="ebas_analytical_instrument_name" value="lambda_18" />
  <attribute name="ebas_analytical_instrument_manufacturer" value="PerkinElmer" />
  <attribute name="ebas_analytical_instrument_model" value="Lambda 18 UV/Vis" />
  <attribute name="ebas_analytical_instrument_serial_number" value="75227" />
  <attribute name="ebas_method_ref" value="LV33L_lambda_18" />
  <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v1996" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="Downward facing" />
  <attribute name="ebas_flow_rate" value="0.5 l/min" />
  <attribute name="ebas_medium" value="Sintered glass" />
  <attribute name="ebas_coating_solution" value="NaI+NaOH" />
  <attribute name="ebas_sample_preparation" value="Water extraction after ultrasonic treatment" />
  <attribute name="ebas_blank_correction" value="Blank corrected" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
  <attribute name="ebas_detection_limit" value="0.029 ug N/m3" />
  <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of laboratory blanks" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as detection limit of laboratory blanks, flagged with 781" />
  <attribute name="ebas_organization" value="LV33L, &quot;Latvian Environment, Geology and Meteorology Centre&quot;, , Monitoring  Department, Maskavas Str. 165, , LV-1019, Riga, Latvia" />
  <attribute name="ebas_framework_acronym" value="EMEP, GAW-WDCA, GAW-WDCRG" />
  <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, World Data Centre for Aerosols, 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., &quot;The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme.&quot;, The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
  <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth, Markus Fiebig, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="kt@nilu.no, Markus.Fiebig@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Indriksone, Iveta, , , , , , , , , &quot;" />
  <attribute name="ebas_submitter" value="&quot;Frolova, Marina, , , , , , , , , &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: EMEP, GAW-WDCA, GAW-WDCRG." />
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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="standard_name_vocabulary" value="CF-1.7, ACDD-1.3" />
  <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="1095" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="3" />
  <dimension name="qc_nitrogen_dioxide_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2017-01-01T20:00:00Z" />
    <attribute name="time_coverage_end" value="2019-12-31T20:00:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="86400.0" />
    <attribute name="time_coverage_duration" value="P0Y0M1094DT0H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-07-07" />
    <attribute name="nciso_version" value="2.4.8" />
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  <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="v_nitrogen_dioxide" 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 meta_nitrogen_dioxide" />
    <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="2024-06-18T14:44:37.531897Z" />
    <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="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="LV0010R" />
    <attribute name="ebas_platform_code" value="LV0010S" />
    <attribute name="ebas_station_name" value="Rucava" />
    <attribute name="ebas_station_latitude" type="double" value="56.161944" />
    <attribute name="ebas_station_longitude" type="double" value="21.173056" />
    <attribute name="ebas_station_altitude" value="18.0 m" />
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    <attribute name="ebas_measurement_height" value="1.8 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="LV33L" />
    <attribute name="ebas_instrument_type" value="glass_sinter" />
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    <attribute name="ebas_analytical_measurement_technique" value="spectrophotometric" />
    <attribute name="ebas_analytical_instrument_name" value="lambda_18" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="PerkinElmer" />
    <attribute name="ebas_analytical_instrument_model" value="Lambda 18 UV/Vis" />
    <attribute name="ebas_analytical_instrument_serial_number" value="75227" />
    <attribute name="ebas_method_ref" value="LV33L_lambda_18" />
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    <attribute name="ebas_medium" value="Sintered glass" />
    <attribute name="ebas_coating_solution" value="NaI+NaOH" />
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    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_detection_limit" value="0.029 ug N/m3" />
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    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, World Data Centre for Aerosols, World Data Centre for Reactive Gases" />
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    <attribute name="ebas_submitter" value="&quot;Frolova, Marina, , , , , , , , , &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: EMEP, GAW-WDCA, GAW-WDCRG." />
    <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" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
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    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
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  <variable name="meta_nitrogen_dioxide" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <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" />
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    <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" />
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