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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="OC/EC at TMNT09 Vielsalm" />
  <attribute name="keywords" value="mass_concentration_of_total_carbon_in_pm2p5_in_air, pm25, mass_concentration_of_organic_carbon_in_pm2p5_in_air, TMNT09 Vielsalm, mass_concentration_of_elemental_carbon_in_pm2p5_in_air, ACTRIS, BE0007R, total_carbon, EMEP, elemental_carbon, organic_carbon, GAW-WDCA" />
  <attribute name="id" value="67JT-YR4M.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="ACTRIS, EMEP, GAW-WDCA" />
  <attribute name="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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
  <attribute name="doi" value="https://doi.org/10.48597/67JT-YR4M" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Bergmans, B., Fays, P., ACTRIS, EMEP, GAW-WDCA, 2025, OC/EC at TMNT09 Vielsalm, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/67JT-YR4M" />
  <attribute name="summary" value="OC/EC at TMNT09 Vielsalm. These measurements are gathered as a part of the following projects ACTRIS, EMEP, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: elemental_carbon in pm25 (mass_concentration_of_elemental_carbon_in_pm2p5_in_air), elemental_carbon in pm25 (mass_concentration_of_elemental_carbon_in_pm2p5_in_air), organic_carbon in pm25 (mass_concentration_of_organic_carbon_in_pm2p5_in_air), organic_carbon in pm25 (mass_concentration_of_organic_carbon_in_pm2p5_in_air), total_carbon in pm25 (mass_concentration_of_total_carbon_in_pm2p5_in_air), total_carbon in pm25 (mass_concentration_of_total_carbon_in_pm2p5_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, 2000, Antwerpen, Belgium" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2025-06-05T12:38:01 UTC" />
  <attribute name="date_metadata_modified" value="2025-06-05T12:38:01 UTC" />
  <attribute name="creator_name" value="Benjamin Bergmans, Pierre Fays" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="b.bergmans@issep.be, p.fays@issep.be" />
  <attribute name="creator_institution" value="&quot;Institut Scientifique de Service Public, 200, ISSeP&quot;, &quot;Institut Scientifique de Service Public, 200, ISSeP&quot;" />
  <attribute name="contributor_name" value="Benjamin Palmaerts" />
  <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="POINT Z (50.304003 6.001271 496.0)" />
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  <attribute name="geospatial_lon_max" type="double" value="6.001271" />
  <attribute name="geospatial_vertical_min" type="double" value="496.0" />
  <attribute name="geospatial_vertical_max" type="double" value="496.0" />
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  <attribute name="time_coverage_start" value="2023-01-21T00:00:00 UTC" />
  <attribute name="time_coverage_end" value="2025-01-01T00:00:00 UTC" />
  <attribute name="time_coverage_duration" value="P0001-11-11T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-01T00:00:00" />
  <attribute name="timezone" value="UTC" />
  <attribute name="ebas_data_definition" value="EBAS_1.1" />
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  <attribute name="ebas_citation" value="Bergmans, B., Fays, P., ACTRIS, EMEP, GAW-WDCA, 2025, OC/EC at TMNT09 Vielsalm, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/67JT-YR4M" />
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  <attribute name="ebas_resolution_code" value="1d" />
  <attribute name="ebas_sample_duration" value="1d" />
  <attribute name="ebas_orig_time_res" value="1d" />
  <attribute name="ebas_station_code" value="BE0007R" />
  <attribute name="ebas_platform_code" value="BE0007S" />
  <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
  <attribute name="ebas_station_latitude" value="50.304003" />
  <attribute name="ebas_station_longitude" value="6.001271" />
  <attribute name="ebas_station_altitude" value="496.0 m" />
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  <attribute name="ebas_measurement_longitude" value="6.001271" />
  <attribute name="ebas_measurement_altitude" value="496.0 m" />
  <attribute name="ebas_measurement_height" value="1.5 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_unit" value="ug C/m3" />
  <attribute name="ebas_matrix" value="pm25" />
  <attribute name="ebas_laboratory_code" value="BE01L" />
  <attribute name="ebas_instrument_type" value="low_vol_sampler" />
  <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
  <attribute name="ebas_instrument_manufacturer" value="Derenda" />
  <attribute name="ebas_instrument_model" value="MVS 6.1" />
  <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
  <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
  <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
  <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
  <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
  <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
  <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
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  <attribute name="ebas_inlet_type" value="Impactor--direct" />
  <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
  <attribute name="ebas_flow_rate" value="38.33 l/min" />
  <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
  <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
  <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
  <attribute name="ebas_medium" value="Quartz" />
  <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
  <attribute name="ebas_filter_conditioning" value="None" />
  <attribute name="ebas_sample_preparation" value="None" />
  <attribute name="ebas_blank_correction" value="Not blank corrected" />
  <attribute name="ebas_artifact_correction" value="Positive only" />
  <attribute name="ebas_charring_correction" value="By laser transmission" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
  <attribute name="ebas_volume_std_temperature" value="ambient" />
  <attribute name="ebas_volume_std_pressure" value="ambient" />
  <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
  <attribute name="ebas_qa1_measure_id" value="ECAC-OCEC-2023-1" />
  <attribute name="ebas_qa1_date" value="2023-03-01 UTC" />
  <attribute name="ebas_qa1_document_name" value="Results of the inter-laboratory comparison exercise for TC and EC measurements (ref.: OCEC-2023-1)" />
  <attribute name="ebas_qa1_document_url" value="https://www.actris-ecac.eu/ocec-2023.html" />
  <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
  <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
  <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
  <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
  <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
  <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
  <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
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  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="comment" value="{&#xA;    &quot;Data definition&quot;: &quot;EBAS_1.1&quot;,&#xA;    &quot;Data license&quot;: &quot;https://creativecommons.org/licenses/by/4.0/&quot;,&#xA;    &quot;Citation&quot;: &quot;Bergmans, B., Fays, P., ACTRIS, EMEP, GAW-WDCA, 2025, OC/EC at TMNT09 Vielsalm, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/67JT-YR4M&quot;,&#xA;    &quot;Set type code&quot;: &quot;TU&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;67JT-YR4M.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/67JT-YR4M&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/67JT-YR4M&quot;,&#xA;    &quot;File creation&quot;: &quot;2025-06-05T12:45:10.792769 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2025-06-05T12:38:01.397158 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20230121000000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20250605123801&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;initial revision, manually inspected&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;2y&quot;,&#xA;    &quot;Resolution code&quot;: &quot;1d&quot;,&#xA;    &quot;Sample duration&quot;: &quot;1d&quot;,&#xA;    &quot;Orig. time res.&quot;: &quot;1d&quot;,&#xA;    &quot;Station code&quot;: &quot;BE0007R&quot;,&#xA;    &quot;Platform code&quot;: &quot;BE0007S&quot;,&#xA;    &quot;Station name&quot;: &quot;TMNT09 Vielsalm&quot;,&#xA;    &quot;Station latitude&quot;: &quot;50.304003&quot;,&#xA;    &quot;Station longitude&quot;: &quot;6.001271&quot;,&#xA;    &quot;Station altitude&quot;: &quot;496.0 m&quot;,&#xA;    &quot;Measurement latitude&quot;: &quot;50.304003&quot;,&#xA;    &quot;Measurement longitude&quot;: &quot;6.001271&quot;,&#xA;    &quot;Measurement altitude&quot;: &quot;496.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;1.5 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Unit&quot;: &quot;ug C/m3&quot;,&#xA;    &quot;Matrix&quot;: &quot;pm25&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;BE01L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;low_vol_sampler&quot;,&#xA;    &quot;Instrument name&quot;: &quot;EQ1-MS-12-96+EQ1-MP-12-55&quot;,&#xA;    &quot;Instrument manufacturer&quot;: &quot;Derenda&quot;,&#xA;    &quot;Instrument model&quot;: &quot;MVS 6.1&quot;,&#xA;    &quot;Instrument serial number&quot;: &quot;N/S 00666, N/S 10243&quot;,&#xA;    &quot;Analytical laboratory code&quot;: &quot;BE01L&quot;,&#xA;    &quot;Analytical measurement technique&quot;: &quot;thermal-optical_analysis&quot;,&#xA;    &quot;Analytical instrument name&quot;: &quot;OCEC_Laboratory_Analyzer&quot;,&#xA;    &quot;Analytical instrument manufacturer&quot;: &quot;Sunset Laboratory&quot;,&#xA;    &quot;Analytical instrument model&quot;: &quot;OCEC Lab Instrument Model 4L&quot;,&#xA;    &quot;Analytical instrument serial number&quot;: &quot;#345-137&quot;,&#xA;    &quot;Method ref&quot;: &quot;BE01L_OCEC_Laboratory_Analyzer&quot;,&#xA;    &quot;Standard method&quot;: &quot;TEMP=EUSAAR_2&quot;,&#xA;    &quot;Inlet type&quot;: &quot;Impactor--direct&quot;,&#xA;    &quot;Inlet description&quot;: &quot;Upward facing with rain shield&quot;,&#xA;    &quot;Flow rate&quot;: &quot;38.33 l/min&quot;,&#xA;    &quot;Filter face velocity&quot;: &quot;36.9 cm/s&quot;,&#xA;    &quot;Exposed filter area&quot;: &quot;12.56 cm2&quot;,&#xA;    &quot;Filter description&quot;: &quot;PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm&quot;,&#xA;    &quot;Medium&quot;: &quot;Quartz&quot;,&#xA;    &quot;Filter prefiring&quot;: &quot;723.15 K, 3.5 h&quot;,&#xA;    &quot;Filter conditioning&quot;: &quot;None&quot;,&#xA;    &quot;Sample preparation&quot;: &quot;None&quot;,&#xA;    &quot;Blank correction&quot;: &quot;Not blank corrected&quot;,&#xA;    &quot;Artifact correction&quot;: &quot;Positive only&quot;,&#xA;    &quot;Charring correction&quot;: &quot;By laser transmission&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;None&quot;,&#xA;    &quot;Humidity/temperature control description&quot;: &quot;filter kept at ambient conditions together with sampling head&quot;,&#xA;    &quot;Volume std. temperature&quot;: &quot;ambient&quot;,&#xA;    &quot;Volume std. pressure&quot;: &quot;ambient&quot;,&#xA;    &quot;Detection limit expl.&quot;: &quot;Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)&quot;,&#xA;    &quot;Zero/negative values code&quot;: &quot;Zero/negative possible&quot;,&#xA;    &quot;Zero/negative values&quot;: &quot;negative values flagged with 781&quot;,&#xA;    &quot;QA1 measure ID&quot;: &quot;ECAC-OCEC-2023-1&quot;,&#xA;    &quot;QA1 date&quot;: &quot;2023-03-01 UTC&quot;,&#xA;    &quot;QA1 document name&quot;: &quot;Results of the inter-laboratory comparison exercise for TC and EC measurements (ref.: OCEC-2023-1)&quot;,&#xA;    &quot;QA1 document URL&quot;: &quot;https://www.actris-ecac.eu/ocec-2023.html&quot;,&#xA;    &quot;Organization&quot;: &quot;BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;ACTRIS, EMEP, GAW-WDCA&quot;,&#xA;    &quot;Framework name&quot;: &quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols&quot;,&#xA;    &quot;Framework description&quot;: &quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme.&quot;,&#xA;    &quot;Framework contact name&quot;: &quot;Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium&quot;,&#xA;    &quot;Submitter&quot;: &quot;Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium&quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator&quot;,&#xA;    &quot;Comment&quot;: &quot;The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach&quot;&#xA;}" />
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  <dimension name="time" length="711" />
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  <dimension name="elemental_carbon_amean_qc_flags" length="1" />
  <dimension name="elemental_carbon_uncertainty_qc_flags" length="1" />
  <dimension name="organic_carbon_amean_qc_flags" length="1" />
  <dimension name="organic_carbon_uncertainty_qc_flags" length="1" />
  <dimension name="Artifact" length="1" />
  <dimension name="organic_carbon_amean_Artifact_qc_flags" length="1" />
  <dimension name="organic_carbon_uncertainty_Artifact_qc_flags" length="1" />
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  <dimension name="total_carbon_uncertainty_qc_flags" length="1" />
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    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="elemental_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
    <attribute name="ebas_method_ref" value="BE01L_OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
    <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.0455 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_qa1_bias" value="-5.3 %" />
    <attribute name="ebas_qa1_variability" value="16.9 %" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="elemental_carbon_amean_qc" shape="elemental_carbon_amean_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="elemental_carbon_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="elemental_carbon_uncertainty" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_elemental_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="elemental_carbon_uncertainty_qc elemental_carbon_uncertainty_ebasmetadata" />
    <attribute name="cell_methods" value="time: uncertainty" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20250605123801" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="elemental_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
    <attribute name="ebas_method_ref" value="BE01L_OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
    <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="elemental_carbon_uncertainty_qc" shape="elemental_carbon_uncertainty_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="elemental_carbon_uncertainty_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="organic_carbon_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="organic_carbon_amean_qc organic_carbon_amean_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="20250605123801" />
    <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="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
    <attribute name="ebas_method_ref" value="BE01L_OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
    <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.113 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_qa1_bias" value="2.8 %" />
    <attribute name="ebas_qa1_variability" value="7.3 %" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="organic_carbon_amean_qc" shape="organic_carbon_amean_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="organic_carbon_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="organic_carbon_uncertainty" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="organic_carbon_uncertainty_qc organic_carbon_uncertainty_ebasmetadata" />
    <attribute name="cell_methods" value="time: uncertainty" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20250605123801" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
    <attribute name="ebas_method_ref" value="BE01L_OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
    <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="organic_carbon_uncertainty_qc" shape="organic_carbon_uncertainty_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="organic_carbon_uncertainty_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="organic_carbon_amean_Artifact" shape="Artifact time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="organic_carbon_amean_Artifact_qc organic_carbon_amean_Artifact_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="20250605123801" />
    <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="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
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    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
    <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="organic_carbon_amean_Artifact_qc" shape="Artifact organic_carbon_amean_Artifact_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="organic_carbon_amean_Artifact_ebasmetadata" shape="Artifact metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="organic_carbon_uncertainty_Artifact" shape="Artifact time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="organic_carbon_uncertainty_Artifact_qc organic_carbon_uncertainty_Artifact_ebasmetadata" />
    <attribute name="cell_methods" value="time: uncertainty" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20250605123801" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
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    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
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    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
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    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
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    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
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    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="organic_carbon_uncertainty_Artifact_qc" shape="Artifact organic_carbon_uncertainty_Artifact_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="organic_carbon_uncertainty_Artifact_ebasmetadata" shape="Artifact metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="total_carbon_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_total_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="total_carbon_amean_qc total_carbon_amean_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="20250605123801" />
    <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="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="total_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
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    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
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    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
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    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.113 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_qa1_bias" value="0.9 %" />
    <attribute name="ebas_qa1_variability" value="5.3 %" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="total_carbon_amean_qc" shape="total_carbon_amean_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="total_carbon_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="total_carbon_uncertainty" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_total_carbon_in_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="total_carbon_uncertainty_qc total_carbon_uncertainty_ebasmetadata" />
    <attribute name="cell_methods" value="time: uncertainty" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20250605123801" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="1d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="TMNT09 Vielsalm" />
    <attribute name="ebas_station_latitude" value="50.304003" />
    <attribute name="ebas_station_longitude" value="6.001271" />
    <attribute name="ebas_station_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_latitude" value="50.304003" />
    <attribute name="ebas_measurement_longitude" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="1.5 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="total_carbon" />
    <attribute name="ebas_unit" value="ug C/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="BE01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="EQ1-MS-12-96+EQ1-MP-12-55" />
    <attribute name="ebas_instrument_manufacturer" value="Derenda" />
    <attribute name="ebas_instrument_model" value="MVS 6.1" />
    <attribute name="ebas_instrument_serial_number" value="N/S 00666, N/S 10243" />
    <attribute name="ebas_analytical_laboratory_code" value="BE01L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 4L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="#345-137" />
    <attribute name="ebas_method_ref" value="BE01L_OCEC_Laboratory_Analyzer" />
    <attribute name="ebas_standard_method" value="TEMP=EUSAAR_2" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
    <attribute name="ebas_filter_face_velocity" value="36.9 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.56 cm2" />
    <attribute name="ebas_filter_description" value="PALLFLEX TISSUQUARTZ 2500-QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="723.15 K, 3.5 h" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="Positive only" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="filter kept at ambient conditions together with sampling head" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="Detection limit for OC and TC is calculated as 3 times standard deviation of 10 fieldblanks. For EC, detection limit is derived by using the instrumental LOD (0.2 µg C cm-2 * Area / Volume)" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="negative values flagged with 781" />
    <attribute name="ebas_organization" value="BE01L, Flanders Environment Agency, VMM, Section Air Immissions, Kronenburgstraat 45, , 2000, Antwerpen, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases, European Monitoring and Evaluation Programme, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre., 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., The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Fays, Pierre, p.fays@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <attribute name="ebas_submitter" value="Palmaerts, Benjamin, b.palmaerts@issep.be, Institut Scientifique de Service Public, ISSeP, 200, Air Quality, Rue du Chéra 200, 4000, Liège, Belgium" />
    <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: ACTRIS, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="The positive sampling artifact of OC was estimated by placing a quartz fiber filter (Backup filter) downstream of a quartz fiber front filter (Front filter); i.e. the QBQ approach" />
  </variable>
  <variable name="total_carbon_uncertainty_qc" shape="total_carbon_uncertainty_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="total_carbon_uncertainty_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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="Artifact" shape="Artifact" type="String" />
</netcdf>
