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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Nitrate at Westerland" />
  <attribute name="summary" value="Nitrate at Westerland. These measurements are gathered as a part of the following projects CAMP, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['nitrate in pm25 (mass_concentration_of_nitrate_expressed_as_nitrogen_in_pm2p5_dry_aerosol_particles_in_air)', 'nitrate in pm25 (mass_concentration_of_nitrate_in_pm2p5_dry_aerosol_particles_in_air)']" />
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  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/8596-9NDJ" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Bieber, E., CAMP, EMEP, 2018, Nitrate at Westerland, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/8596-9NDJ" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="DE03L Umweltbundesamt UBA-LA Langen &quot;Paul-Ehrlich-Str. 29&quot; 63225 Langen Germany" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2018-11-13T09:51:00.303000Z" />
  <attribute name="date_metadata_modified" value="2018-11-13T09:42:58Z" />
  <attribute name="creator_name" value="Elke Bieber" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="Anke Penzlin" />
  <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="MULTIPOINT Z ((8.3246 54.892 5), (8.309722 54.925556 5))" />
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  <attribute name="geospatial_lat_max" type="double" value="54.925556" />
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  <attribute name="geospatial_lon_max" type="double" value="8.3246" />
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  <attribute name="timezone" value="UTC" />
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  <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="6d" />
  <attribute name="ebas_sample_duration" value="1d" />
  <attribute name="ebas_orig_time_res" value="6d" />
  <attribute name="ebas_station_code" value="DE0001R" />
  <attribute name="ebas_platform_code" value="DE0001S" />
  <attribute name="ebas_station_name" value="Westerland" />
  <attribute name="ebas_station_gaw_id" value="WES" />
  <attribute name="ebas_station_gaw_name" value="Westerland" />
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  <attribute name="ebas_station_land_use" value="Grassland" />
  <attribute name="ebas_station_setting" value="Coastal" />
  <attribute name="ebas_station_gaw_type" value="C" />
  <attribute name="ebas_station_wmo_region" type="long" value="6" />
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  <attribute name="ebas_station_longitude" type="double" value="8.309722" />
  <attribute name="ebas_station_altitude" value="12.0 m" />
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  <attribute name="ebas_measurement_longitude" type="double" value="8.3246" />
  <attribute name="ebas_measurement_altitude" value="5.0 m" />
  <attribute name="ebas_measurement_height" value="1.6 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="nitrate" />
  <attribute name="ebas_matrix" value="pm25" />
  <attribute name="ebas_laboratory_code" value="DE03L" />
  <attribute name="ebas_instrument_type" value="low_vol_sampler" />
  <attribute name="ebas_instrument_name" value="UBA_We_LVS_0301" />
  <attribute name="ebas_instrument_manufacturer" value="Leckel" />
  <attribute name="ebas_instrument_model" value="SEQ47/50" />
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  <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014" />
  <attribute name="ebas_inlet_type" value="Impactor--direct" />
  <attribute name="ebas_inlet_description" value="PM 2.5, upward facing" />
  <attribute name="ebas_medium" value="Quartz" />
  <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" />
  <attribute name="ebas_volume_std_temperature" value="293.15 K" />
  <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
  <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of laboratory blanks" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
  <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as half of detection limit, flagged with 780" />
  <attribute name="ebas_organization" value="DE03L, Umweltbundesamt, UBA-LA, Langen, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany" />
  <attribute name="ebas_framework_acronym" value="CAMP, EMEP" />
  <attribute name="ebas_framework_name" value="OSPARCOM - Comprehensive Atmospheric Monitoring Programme, European Monitoring and Evaluation Programme" />
  <attribute name="ebas_framework_description" value="The OSPARCOM Comprehensive Atmospheric Monitoring Programme goal is the assessment of the atmospheric input of selected contaminants to the OSPAR maritime area and regions., 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="Wenche Aas, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Bieber, Elke, , , , , , , , , &quot;" />
  <attribute name="ebas_submitter" value="&quot;Penzlin, Anke, anke.penzlin@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&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: CAMP, EMEP. Request acknowledgement details from data originator" />
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  <attribute name="Metadata_Conventions" value="Unidata Dataset Discovery v1.0" />
  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="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="183" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="3" />
  <dimension name="qc_nitrate_ug_N_per_m3_flags" length="1" />
  <dimension name="qc_nitrate_ug_per_m3_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2014-01-02T11:00:00Z" />
    <attribute name="time_coverage_end" value="2016-12-28T11:00:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="517925.0" />
    <attribute name="time_coverage_duration" value="P0Y0M1091DT0H0M0.000S" />
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    <attribute name="metadata_creation" value="2026-05-18" />
    <attribute name="nciso_version" value="2.4.8" />
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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_nitrate_ug_N_per_m3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="qc_nitrate_ug_N_per_m3 meta_nitrate_ug_N_per_m3" />
    <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="2018-11-13T09:42:58.033000Z" />
    <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="6d" />
    <attribute name="ebas_station_code" value="DE0001R" />
    <attribute name="ebas_platform_code" value="DE0001S" />
    <attribute name="ebas_station_name" value="Westerland" />
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    <attribute name="ebas_station_other_ids" value="DEUB001 (UBA), 10020-0 (WMO)" />
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    <attribute name="ebas_station_gaw_type" value="C" />
    <attribute name="ebas_station_wmo_region" type="long" value="6" />
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    <attribute name="ebas_measurement_altitude" value="5.0 m" />
    <attribute name="ebas_measurement_height" value="1.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrate" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="pm25" />
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    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
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    <attribute name="ebas_framework_contact_name" value="Wenche Aas, Kjetil Tørseth" />
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    <attribute name="ebas_originator" value="&quot;Bieber, Elke, , , , , , , , , &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: CAMP, EMEP. Request acknowledgement details from data originator" />
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    <attribute name="actris_variable_preferred_term" value="aerosol particle nitrate mass concentration" />
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    <attribute name="ancillary_variables" value="qc_nitrate_ug_per_m3 meta_nitrate_ug_per_m3" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_measurement_altitude" value="5.0 m" />
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    <attribute name="ebas_component" value="nitrate" />
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    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
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    <attribute name="ebas_framework_description" value="The OSPARCOM Comprehensive Atmospheric Monitoring Programme goal is the assessment of the atmospheric input of selected contaminants to the OSPAR maritime area and regions., 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="Wenche Aas, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Bieber, Elke, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Penzlin, Anke, anke.penzlin@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&quot;" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlenitratemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle nitrate mass concentration" />
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    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
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    <attribute name="actris_temporal_resolution" value="P6D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_nitrate_ug_per_m3" shape="qc_nitrate_ug_per_m3_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_nitrate_ug_per_m3" 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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</netcdf>
