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  <attribute name="title" value="Nitrogen oxides at Cabauw Wielsekade" />
  <attribute name="summary" value="Nitrogen oxides at Cabauw Wielsekade. These measurements are gathered as a part of the following projects EMEP 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)', 'nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air)', 'nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air)']" />
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  <attribute name="doi" value="https://doi.org/10.48597/KD26-TZ3R" />
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  <attribute name="citation" value="Spoor, R., EMEP, 2024, Nitrogen oxides at Cabauw Wielsekade, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/KD26-TZ3R" />
  <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;" />
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  <attribute name="date_created" value="2024-09-18T13:32:56.249794Z" />
  <attribute name="date_metadata_modified" value="2024-09-18T13:32:56 UTC" />
  <attribute name="creator_name" value="Ronald Spoor" />
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  <attribute name="contributor_name" value="Rob Zwartjes, Mirian Wietses" />
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  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
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  <attribute name="ebas_matrix" value="air" />
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  <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
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  <attribute name="ebas_originator" value="&quot;Spoor, Ronald, , , , , , , , , &quot;" />
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  <dimension name="tbnds" length="2" />
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  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2016-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2023-12-31T23:30:00Z" />
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    <attribute name="metadata_creation" value="2026-05-18" />
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    <attribute name="long_name" value="time bounds for measurement" />
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    <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="nitrogen_monoxide" />
    <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="chemiluminescence_molybdenum" />
    <attribute name="ebas_instrument_name" value="API200E_nl0644" />
    <attribute name="ebas_method_ref" value="NL01L_MIL-W-5300_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="EMEP" />
    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme" />
    <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." />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Spoor, Ronald, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Zwartjes, Rob, rob.zwartjes@rivm.nl, Rijks instituut voor volgezondsheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;, &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 framework: 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/nitricoxideamountfraction" />
    <attribute name="actris_variable_preferred_term" value="nitric oxide 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/chemiluminescencedetector-molybdenumconverter" />
    <attribute name="actris_instrument_type_preferred_term" value="chemiluminescence detector, molybdenum converter" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP" />
    <attribute name="actris_framework_preferred_term" value="EMEP" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="nitrogen_monoxide_nmol_per_mol_qc" shape="nitrogen_monoxide_nmol_per_mol_qc_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="nitrogen_monoxide_nmol_per_mol_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_monoxide_ug N_per_m3_qc nitrogen_monoxide_ug N_per_m3_ebasmetadata" />
    <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="2024-09-18T13:32:56.249794Z" />
    <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="NL0644R" />
    <attribute name="ebas_platform_code" value="NL0644S" />
    <attribute name="ebas_station_name" value="Cabauw Wielsekade" />
    <attribute name="ebas_station_latitude" type="double" value="51.974444" />
    <attribute name="ebas_station_longitude" type="double" value="4.923611" />
    <attribute name="ebas_station_altitude" value="1.0 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="nitrogen_monoxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="NL01L" />
    <attribute name="ebas_instrument_type" value="chemiluminescence_molybdenum" />
    <attribute name="ebas_instrument_name" value="API200E_nl0644" />
    <attribute name="ebas_method_ref" value="NL01L_MIL-W-5300_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;, , , , " />
    <attribute name="ebas_framework_acronym" value="EMEP" />
    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme" />
    <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." />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Spoor, Ronald, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Zwartjes, Rob, rob.zwartjes@rivm.nl, Rijks instituut voor volgezondsheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;, &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 framework: EMEP." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="nitric oxide 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/chemiluminescencedetector-molybdenumconverter" />
    <attribute name="actris_instrument_type_preferred_term" value="chemiluminescence detector, molybdenum converter" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP" />
    <attribute name="actris_framework_preferred_term" value="EMEP" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="nitrogen_monoxide_ug_N_per_m3_qc" shape="nitrogen_monoxide_ug_N_per_m3_qc_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="nitrogen_monoxide_ug_N_per_m3_ebasmetadata" 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>
