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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ammonia at De Zilk" />
  <attribute name="summary" value="Ammonia at De Zilk. 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="&quot;De Zilk&quot; NL0091R ammonia air CAMP EMEP mole_fraction_of_ammonia_in_air mass_concentration_of_ammonia_expressed_as_nitrogen_in_air" />
  <attribute name="id" value="5S7C-VJ6Z.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="CAMP, EMEP" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/5S7C-VJ6Z" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Spoor, R., CAMP, EMEP, 2023, Ammonia at De Zilk, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/5S7C-VJ6Z" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="NL01L &quot;Rijks institut voor volksgezondheid en milieuhygiene&quot; RIVM &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2023-11-13T14:31:51.872168Z" />
  <attribute name="date_metadata_modified" value="2023-11-13T14:31:51Z" />
  <attribute name="creator_name" value="Ronald Spoor" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="Mirian Wietses" />
  <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" />
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  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (4.5 52.3 4)" />
  <attribute name="geospatial_lat_min" type="double" value="52.3" />
  <attribute name="geospatial_lat_max" type="double" value="52.3" />
  <attribute name="geospatial_lon_min" type="double" value="4.5" />
  <attribute name="geospatial_lon_max" type="double" value="4.5" />
  <attribute name="geospatial_vertical_min" type="double" value="4.0" />
  <attribute name="geospatial_vertical_max" type="double" value="4.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2016-01-01T00:00:00Z" />
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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="Spoor, R., CAMP, EMEP, 2023, Ammonia at De Zilk, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/5S7C-VJ6Z" />
  <attribute name="ebas_set_type_code" value="TI" />
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  <attribute name="ebas_file_creation" value="2026-06-10T20:54:19.854492Z" />
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  <attribute name="ebas_startdate" value="2016-01-01T00:00:00.000000Z" />
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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="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="7y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_station_code" value="NL0091R" />
  <attribute name="ebas_platform_code" value="NL0091S" />
  <attribute name="ebas_station_name" value="De Zilk" />
  <attribute name="ebas_station_latitude" type="double" value="52.3" />
  <attribute name="ebas_station_longitude" type="double" value="4.5" />
  <attribute name="ebas_station_altitude" value="4.0 m" />
  <attribute name="ebas_measurement_altitude" value="4.0 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="NL01L" />
  <attribute name="ebas_instrument_type" value="doas" />
  <attribute name="ebas_instrument_name" value="doas" />
  <attribute name="ebas_instrument_manufacturer" value="RIVM-MIL" />
  <attribute name="ebas_instrument_model" value="MiniDOAS 1.0" />
  <attribute name="ebas_method_ref" value="NL01L_MIL-W-5500_NL01L_ILG-W-2900" />
  <attribute name="ebas_blank_correction" value="Not blank corrected" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit, flagged with 780" />
  <attribute name="ebas_organization" value="NL01L, Rijks institut voor volksgezondheid en milieuhygiene, RIVM, , &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;, , , , " />
  <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;Spoor, Ronald, , , , , , , , , &quot;" />
  <attribute name="ebas_submitter" value="&quot;Wietses, Mirian, mirian.wietses@rivm.nl, Rijks instituut voor volksgezondheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&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." />
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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="52584" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="6" />
  <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="2016-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2022-12-31T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="4201.0" />
    <attribute name="time_coverage_duration" value="P0Y0M2556DT23H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-07-07" />
    <attribute name="nciso_version" value="2.4.8" />
  </group>
  <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_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="2023-11-13T14:31:51.872168Z" />
    <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="1h" />
    <attribute name="ebas_station_code" value="NL0091R" />
    <attribute name="ebas_platform_code" value="NL0091S" />
    <attribute name="ebas_station_name" value="De Zilk" />
    <attribute name="ebas_station_latitude" type="double" value="52.3" />
    <attribute name="ebas_station_longitude" type="double" value="4.5" />
    <attribute name="ebas_station_altitude" value="4.0 m" />
    <attribute name="ebas_measurement_altitude" value="4.0 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" />
    <attribute name="ebas_laboratory_code" value="NL01L" />
    <attribute name="ebas_instrument_type" value="doas" />
    <attribute name="ebas_instrument_name" value="doas" />
    <attribute name="ebas_instrument_manufacturer" value="RIVM-MIL" />
    <attribute name="ebas_instrument_model" value="MiniDOAS 1.0" />
    <attribute name="ebas_method_ref" value="NL01L_MIL-W-5500_NL01L_ILG-W-2900" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit, flagged with 780" />
    <attribute name="ebas_organization" value="NL01L, Rijks institut voor volksgezondheid en milieuhygiene, RIVM, , &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;, , , , " />
    <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;Spoor, Ronald, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Wietses, Mirian, mirian.wietses@rivm.nl, Rijks instituut voor volksgezondheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&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." />
    <attribute name="ebas_comment" value="Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.600." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ammoniaamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ammonia amount fraction" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/iterativecavity-enhanceddifferentialopticalabsorptionspectrometer" />
    <attribute name="actris_instrument_type_preferred_term" value="iterative cavity-enhanced differential optical absorption spectrometer" />
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    <attribute name="standard_name" value="status_flag" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ammonia_ug_N_per_m3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ammonia_expressed_as_nitrogen_in_air" />
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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="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_component" value="ammonia" />
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    <attribute name="ebas_instrument_type" value="doas" />
    <attribute name="ebas_instrument_name" value="doas" />
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    <attribute name="ebas_instrument_model" value="MiniDOAS 1.0" />
    <attribute name="ebas_method_ref" value="NL01L_MIL-W-5500_NL01L_ILG-W-2900" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit, flagged with 780" />
    <attribute name="ebas_organization" value="NL01L, Rijks institut voor volksgezondheid en milieuhygiene, RIVM, , &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;, , , , " />
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    <attribute name="ebas_framework_contact_email" value="waa@nilu.no, kt@nilu.no" />
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    <attribute name="ebas_submitter" value="&quot;Wietses, Mirian, mirian.wietses@rivm.nl, Rijks instituut voor volksgezondheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&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." />
    <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/iterativecavity-enhanceddifferentialopticalabsorptionspectrometer" />
    <attribute name="actris_instrument_type_preferred_term" value="iterative cavity-enhanced differential optical absorption spectrometer" />
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    <attribute name="actris_framework_preferred_term" value="CAMP, EMEP" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
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  <variable name="qc_ammonia_ug_N_per_m3" shape="qc_ammonia_ug_N_per_m3_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
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  <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" />
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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" />
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    <attribute name="_CoordinateAxisType" value="Time" />
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    <attribute name="long_name" value="time of ebas metadata intervals" />
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