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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ammonia at Westerland" />
  <attribute name="summary" value="Ammonia 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: ['ammonia in air (mole_fraction_of_ammonia_in_air)', 'ammonia in air (mass_concentration_of_ammonia_expressed_as_nitrogen_in_air)']" />
  <attribute name="keywords" value="Westerland DE0001R ammonia air CAMP EMEP mole_fraction_of_ammonia_in_air mass_concentration_of_ammonia_expressed_as_nitrogen_in_air" />
  <attribute name="id" value="ZMRD-JAA3.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="CAMP, EMEP" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/ZMRD-JAA3" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Wallasch, M., Schleyer, R., Bryan, H., Bachmeier, F., CAMP, EMEP, 2025, Ammonia at Westerland, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/ZMRD-JAA3" />
  <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="2025-10-07T13:11:41.652830Z" />
  <attribute name="date_metadata_modified" value="2025-10-07T13:11:41Z" />
  <attribute name="creator_name" value="Markus Wallasch, Ruprecht Schleyer, Hellack Bryan, Franziska Bachmeier" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value=", ruprecht.schleyer@uba.de, bryan.hellack@uba.de, franziska.bachmeier@uba.de" />
  <attribute name="creator_institution" value=", &quot;Umweltbundesamt Langen, Air Monitoring Network, UBA&quot;, &quot;Umweltbundesamt Langen, Air Monitoring Network, UBA&quot;, &quot;Umweltbundesamt Langen, Air Monitoring Network, UBA&quot;" />
  <attribute name="contributor_name" value="Anke Penzlin, Stefan Feigenspan" />
  <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="MULTIPOINT Z ((8.3246 54.892 5), (8.309722 54.925556 5))" />
  <attribute name="geospatial_lat_min" type="double" value="54.892" />
  <attribute name="geospatial_lat_max" type="double" value="54.925556" />
  <attribute name="geospatial_lon_min" type="double" value="8.309722" />
  <attribute name="geospatial_lon_max" type="double" value="8.3246" />
  <attribute name="geospatial_vertical_min" type="double" value="5.0" />
  <attribute name="geospatial_vertical_max" type="double" value="5.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2015-12-29T07:00:00Z" />
  <attribute name="time_coverage_end" value="2024-12-30T07:00:00Z" />
  <attribute name="time_coverage_duration" value="P0009-00-01T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-07T00:00:00" />
  <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="Wallasch, M., Schleyer, R., Bryan, H., Bachmeier, F., CAMP, EMEP, 2025, Ammonia at Westerland, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/ZMRD-JAA3" />
  <attribute name="ebas_set_type_code" value="TI" />
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  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/ZMRD-JAA3" />
  <attribute name="ebas_file_creation" value="2026-05-08T20:03:51.059136Z" />
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  <attribute name="ebas_startdate" value="2015-12-29T07:00:00.000000Z" />
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  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="initial revision, automatically generated, manually inspected" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="9y" />
  <attribute name="ebas_resolution_code" value="1w" />
  <attribute name="ebas_sample_duration" value="1w" />
  <attribute name="ebas_orig_time_res" value="1w" />
  <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" />
  <attribute name="ebas_station_other_ids" value="DEUB001 (UBA), 10020-0 (WMO)" />
  <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" />
  <attribute name="ebas_station_latitude" type="double" value="54.925556" />
  <attribute name="ebas_station_longitude" type="double" value="8.309722" />
  <attribute name="ebas_station_altitude" value="12.0 m" />
  <attribute name="ebas_measurement_latitude" type="double" value="54.892" />
  <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="2.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="ammonia" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="DE03L" />
  <attribute name="ebas_instrument_type" value="denuder" />
  <attribute name="ebas_instrument_name" value="UBA_We_Den_0002" />
  <attribute name="ebas_instrument_manufacturer" value="Riemer" />
  <attribute name="ebas_instrument_model" value="DEN2" />
  <attribute name="ebas_method_ref" value="DE27L_UBA_Ng_FIA_0001" />
  <attribute name="ebas_standard_method" value="None" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="downward facing funnel" />
  <attribute name="ebas_coating_solution" value="Citric acid" />
  <attribute name="ebas_sample_preparation" value="Water extraction" />
  <attribute name="ebas_blank_correction" value="Not blank corrected" />
  <attribute name="ebas_detection_limit_expl" value="Estimated from calibration" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
  <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;Wallasch, Markus, , , , , , , , , &quot;, &quot;Schleyer, Ruprecht, ruprecht.schleyer@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&quot;, &quot;Bryan, Hellack, bryan.hellack@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&quot;, &quot;Bachmeier, Franziska, franziska.bachmeier@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&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;, &quot;Feigenspan, Stefan, stefan.feigenspan@uba.de, Umweltbundesamt, UBA, Air Quality Assessment, Woerlitzer Platz 1, , 06844, Dessau-Rosslau, 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" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="454" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="9" />
  <dimension name="qc_ammonia_nmol_per_mol_flags" length="1" />
  <dimension name="qc_ammonia_ug_N_per_m3_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2016-01-01T19:00:00Z" />
    <attribute name="time_coverage_end" value="2024-12-26T19:00:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="625970.0" />
    <attribute name="time_coverage_duration" value="P0Y0M3282DT0H0M0.000S" />
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    <attribute name="metadata_creation" value="2026-05-18" />
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  <variable name="time_bnds" shape="time tbnds" type="double">
    <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_ammonia_nmol_per_mol" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ammonia_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="qc_ammonia_nmol_per_mol meta_ammonia_nmol_per_mol" />
    <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="2025-10-07T13:11:41.652830Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, automatically generated, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_orig_time_res" value="1w" />
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    <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_measurement_altitude" value="5.0 m" />
    <attribute name="ebas_measurement_height" value="2.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ammonia" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
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    <attribute name="ebas_instrument_type" value="denuder" />
    <attribute name="ebas_instrument_name" value="UBA_We_Den_0002" />
    <attribute name="ebas_instrument_manufacturer" value="Riemer" />
    <attribute name="ebas_instrument_model" value="DEN2" />
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    <attribute name="ebas_inlet_description" value="downward facing funnel" />
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    <attribute name="ebas_sample_preparation" value="Water extraction" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
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    <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_ammonia_ug_N_per_m3 meta_ammonia_ug_N_per_m3" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_station_latitude" type="double" value="54.925556" />
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    <attribute name="ebas_measurement_altitude" value="5.0 m" />
    <attribute name="ebas_measurement_height" value="2.0 m" />
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    <attribute name="ebas_matrix" value="air" />
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    <attribute name="ebas_instrument_type" value="denuder" />
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    <attribute name="ebas_instrument_model" value="DEN2" />
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    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <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="Estimated from calibration" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
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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;Wallasch, Markus, , , , , , , , , &quot;, &quot;Schleyer, Ruprecht, ruprecht.schleyer@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&quot;, &quot;Bryan, Hellack, bryan.hellack@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&quot;, &quot;Bachmeier, Franziska, franziska.bachmeier@uba.de, Umweltbundesamt Langen, UBA, Air Monitoring Network, Paul-Ehrlich-Str. 29, , 63225, Langen, Germany&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;, &quot;Feigenspan, Stefan, stefan.feigenspan@uba.de, Umweltbundesamt, UBA, Air Quality Assessment, Woerlitzer Platz 1, , 06844, Dessau-Rosslau, 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" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ammoniamassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ammonia mass concentration" />
    <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_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/denuder" />
    <attribute name="actris_instrument_type_preferred_term" value="denuder" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/CAMP, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP" />
    <attribute name="actris_framework_preferred_term" value="CAMP, EMEP" />
    <attribute name="actris_temporal_resolution" value="P7D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ammonia_ug_N_per_m3" shape="qc_ammonia_ug_N_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_ammonia_ug_N_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" />
  </variable>
</netcdf>
