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  <attribute name="title" value="VOC (aromatics) at TMEG01 Engis" />
  <attribute name="summary" value="VOC (aromatics) at TMEG01 Engis. These measurements are gathered as a part of the following projects CAMPAIGN and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['benzene in air (mole_fraction_of_benzene_in_air)', 'ethylbenzene in air (mole_fraction_of_ethylbenzene_in_air)', 'm-p-xylene in air (mole_fraction_of_m-p-xylene_in_air)', 'm-p-xylene in air (mole_fraction_of_m_p_xylene_in_air)', 'toluene in air (mole_fraction_of_toluene_in_air)']" />
  <attribute name="keywords" value="&quot;TMEG01 Engis&quot; BE0018U benzene ethylbenzene m-p-xylene toluene air CAMPAIGN mole_fraction_of_benzene_in_air mole_fraction_of_ethylbenzene_in_air mole_fraction_of_m-p-xylene_in_air mole_fraction_of_m_p_xylene_in_air mole_fraction_of_toluene_in_air" />
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  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/BFVJ-YSSV" />
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  <attribute name="citation" value="Bergmans, B., Luthers, C., CAMPAIGN, 2025, VOC (aromatics) at TMEG01 Engis, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/BFVJ-YSSV" />
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  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-01-21T09:41:42.199638Z" />
  <attribute name="date_metadata_modified" value="2025-05-13T07:30:00Z" />
  <attribute name="creator_name" value="Benjamin Bergmans, Cédric Luthers" />
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  <attribute name="contributor_name" value="Marvin Dufresne" />
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  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
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  <attribute name="ebas_station_altitude" value="137.0 m" />
  <attribute name="ebas_measurement_altitude" value="141.5 m" />
  <attribute name="ebas_measurement_height" value="4.5 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="BE01L" />
  <attribute name="ebas_instrument_type" value="online_gc" />
  <attribute name="ebas_instrument_name" value="GC955" />
  <attribute name="ebas_instrument_manufacturer" value="Syntech Spectras" />
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  <attribute name="ebas_instrument_serial_number" value="2257" />
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  <attribute name="ebas_standard_method" value="SOP=ACTRIS_VOC_2014" />
  <attribute name="ebas_calibration_scale" value="NPL" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
  <attribute name="ebas_zero_negative_values" value="Values below detection limit are manually removed from the data" />
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  <attribute name="ebas_submitter" value="&quot;Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France&quot;" />
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  <dimension name="time" length="840" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="qc_benzene_ng_per_m3_flags" length="1" />
  <dimension name="qc_benzene_pmol_per_mol_flags" length="1" />
  <dimension name="qc_ethylbenzene_ng_per_m3_flags" length="1" />
  <dimension name="qc_ethylbenzene_pmol_per_mol_flags" length="1" />
  <dimension name="qc_m_p_xylene_ng_per_m3_flags" length="1" />
  <dimension name="qc_m_p_xylene_pmol_per_mol_flags" length="1" />
  <dimension name="qc_toluene_ng_per_m3_flags" length="1" />
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  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2024-08-27T00:30:00Z" />
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    <attribute name="metadata_creation" value="2026-05-17" />
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    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
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    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
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    <attribute name="ebas_component" value="benzene" />
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    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.49. Detection limit converted from '31.0 pmol/mol' to '108.0 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 3.49." />
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    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
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    <attribute name="ebas_submitter" value="&quot;Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France&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: CAMPAIGN. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period" />
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    <attribute name="ebas_revision_date" value="2025-05-13T07:30:00.000000Z" />
    <attribute name="ebas_version" value="2" />
    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_sample_duration" value="1h" />
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    <attribute name="ebas_station_code" value="BE0018U" />
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    <attribute name="ebas_station_name" value="TMEG01 Engis" />
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    <attribute name="ebas_station_setting" value="Suburban" />
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    <attribute name="ebas_measurement_height" value="4.5 m" />
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    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 4.74. Detection limit converted from '22.7 pmol/mol' to '108.0 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 4.74." />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_orig_time_res" value="30mn" />
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    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ethylbenzeneamountfraction" />
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    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
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    <attribute name="ebas_station_name" value="TMEG01 Engis" />
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    <attribute name="ebas_station_latitude" type="double" value="50.5832142" />
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    <attribute name="ebas_regime" value="IMG" />
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    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 4.74. Detection limit converted from '22.7 pmol/mol' to '108.0 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 4.74." />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="ebas_component" value="m-p-xylene" />
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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 framework: CAMPAIGN. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/mDivp-xylenesamountfraction" />
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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" />
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    <attribute name="standard_name" value="mole_fraction_of_toluene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="" />
    <attribute name="ebas_revision_date" value="2025-05-13T07:30:00.000000Z" />
    <attribute name="ebas_version" value="2" />
    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="30mn" />
    <attribute name="ebas_station_code" value="BE0018U" />
    <attribute name="ebas_platform_code" value="BE0018S" />
    <attribute name="ebas_station_name" value="TMEG01 Engis" />
    <attribute name="ebas_station_land_use" value="Industrial" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="50.5832142" />
    <attribute name="ebas_station_longitude" type="double" value="5.39746727" />
    <attribute name="ebas_station_altitude" value="137.0 m" />
    <attribute name="ebas_measurement_altitude" value="141.5 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="toluene" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="GC955" />
    <attribute name="ebas_instrument_manufacturer" value="Syntech Spectras" />
    <attribute name="ebas_instrument_model" value="GC955" />
    <attribute name="ebas_instrument_serial_number" value="2257" />
    <attribute name="ebas_method_ref" value="BE01L_BE0018U_GC955_IMP2024" />
    <attribute name="ebas_standard_method" value="SOP=ACTRIS_VOC_2014" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="107.0 ng/m3" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_zero_negative_values" value="Values below detection limit are manually removed from the data" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN" />
    <attribute name="ebas_framework_name" value="" />
    <attribute name="ebas_framework_description" value="" />
    <attribute name="ebas_framework_contact_name" value="Wenche Aas" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Bergmans, Benjamin, b.bergmans@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chera 200, , 4000 Liege, Belgium&quot;, &quot;Luthers, Cédric, c.luthers@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" value="&quot;Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France&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: CAMPAIGN. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 4.11. Detection limit converted from '26.0 pmol/mol' to '107.0 ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 4.11." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/toluenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="toluene 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_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/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="" />
    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="1" />
  </variable>
  <variable name="qc_toluene_ng_per_m3" shape="qc_toluene_ng_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_toluene_ng_per_m3" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_toluene_pmol_per_mol" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_toluene_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="pmol/mol" />
    <attribute name="ancillary_variables" value="v_toluene_pmol_per_mol_qc v_toluene_pmol_per_mol_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="" />
    <attribute name="ebas_revision_date" value="2025-05-13T07:30:00.000000Z" />
    <attribute name="ebas_version" value="2" />
    <attribute name="ebas_version_description" value="Flag 559 added on many m-p-xylene and ethylbenzene measurement due to the influence of the industrial site next to the station" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="30mn" />
    <attribute name="ebas_station_code" value="BE0018U" />
    <attribute name="ebas_platform_code" value="BE0018S" />
    <attribute name="ebas_station_name" value="TMEG01 Engis" />
    <attribute name="ebas_station_land_use" value="Industrial" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="50.5832142" />
    <attribute name="ebas_station_longitude" type="double" value="5.39746727" />
    <attribute name="ebas_station_altitude" value="137.0 m" />
    <attribute name="ebas_measurement_altitude" value="141.5 m" />
    <attribute name="ebas_measurement_height" value="4.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="toluene" />
    <attribute name="ebas_unit" value="pmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="online_gc" />
    <attribute name="ebas_instrument_name" value="GC955" />
    <attribute name="ebas_instrument_manufacturer" value="Syntech Spectras" />
    <attribute name="ebas_instrument_model" value="GC955" />
    <attribute name="ebas_instrument_serial_number" value="2257" />
    <attribute name="ebas_method_ref" value="BE01L_BE0018U_GC955_IMP2024" />
    <attribute name="ebas_standard_method" value="SOP=ACTRIS_VOC_2014" />
    <attribute name="ebas_calibration_scale" value="NPL" />
    <attribute name="ebas_detection_limit" value="26.0 pmol/mol" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_zero_negative_values" value="Values below detection limit are manually removed from the data" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="CAMPAIGN" />
    <attribute name="ebas_framework_name" value="" />
    <attribute name="ebas_framework_description" value="" />
    <attribute name="ebas_framework_contact_name" value="Wenche Aas" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Bergmans, Benjamin, b.bergmans@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chera 200, , 4000 Liege, Belgium&quot;, &quot;Luthers, Cédric, c.luthers@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" value="&quot;Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France&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: CAMPAIGN. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="EMEP ACTRIS intensive measurement period" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/tolueneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="toluene 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/gaschromatograph-online" />
    <attribute name="actris_instrument_type_preferred_term" value="gas chromatograph, online" />
    <attribute name="actris_framework_uri" value="" />
    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="1" />
  </variable>
  <variable name="qc_toluene_pmol_per_mol" shape="qc_toluene_pmol_per_mol_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_toluene_pmol_per_mol" 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>
