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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="OC/EC at Vielsalm" />
  <attribute name="summary" value="OC/EC at Vielsalm. These measurements are gathered as a part of the following projects ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['elemental_carbon in pm10 (mass_concentration_of_elemental_carbon_in_pm10_in_air)', 'organic_carbon in pm10 (mass_concentration_of_organic_carbon_in_pm10_in_air)', 'total_carbon in pm10 (mass_concentration_of_total_carbon_in_pm10_in_air)']" />
  <attribute name="keywords" value="Vielsalm BE0007R elemental_carbon organic_carbon total_carbon pm10 ACTRIS CAMPAIGN COLOSSAL GAW-WDCA mass_concentration_of_elemental_carbon_in_pm10_in_air mass_concentration_of_organic_carbon_in_pm10_in_air mass_concentration_of_total_carbon_in_pm10_in_air" />
  <attribute name="id" value="UE6U-UD9N.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/UE6U-UD9N" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Bergmans, B., FONSNY, E., ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA, 2018, OC/EC at Vielsalm, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/UE6U-UD9N" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="BE03L &quot;Institut Scientifique de Service Public&quot; ISSeP &quot;Rue Chéra, 200&quot; 4000 Liege Belgium" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-02T12:57:24.419347Z" />
  <attribute name="date_metadata_modified" value="2018-06-25T00:00:00Z" />
  <attribute name="creator_name" value="Benjamin Bergmans, Eric FONSNY" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="b.bergmans@issep.be, fonsny@issep.be" />
  <attribute name="creator_institution" value="&quot;Institut Scientifique de Service Public, 200, ISSeP&quot;, &quot;Institut Scientifique de Service Public, Air quality, ISSeP&quot;" />
  <attribute name="contributor_name" value="Benjamin Bergmans, Eric FONSNY" />
  <attribute name="contributor_role" value="data submitter, data submitter" />
  <attribute name="publisher_type" value="institution" />
  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (6.001271 50.304003 496)" />
  <attribute name="geospatial_lat_min" type="double" value="50.304003" />
  <attribute name="geospatial_lat_max" type="double" value="50.304003" />
  <attribute name="geospatial_lon_min" type="double" value="6.001271" />
  <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" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2017-12-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2018-04-02T00:00:00Z" />
  <attribute name="time_coverage_duration" value="P0000-04-01T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-04T00:00:00" />
  <attribute name="timezone" value="UTC" />
  <attribute name="ebas_data_definition" value="EBAS_1.1" />
  <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="ebas_citation" value="Bergmans, B., FONSNY, E., ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA, 2018, OC/EC at Vielsalm, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/UE6U-UD9N" />
  <attribute name="ebas_set_type_code" value="TI" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="UE6U-UD9N.nc" />
  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/UE6U-UD9N" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/UE6U-UD9N" />
  <attribute name="ebas_file_creation" value="2026-06-14T00:17:58.698269Z" />
  <attribute name="ebas_export_state" value="2026-06-02T12:57:24.419347Z" />
  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="2017-12-01T00:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2018-06-25T00:00:00.000000Z" />
  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="initial revision. manually inspected" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="4mo" />
  <attribute name="ebas_resolution_code" value="4d" />
  <attribute name="ebas_sample_duration" value="2d" />
  <attribute name="ebas_orig_time_res" value="2d" />
  <attribute name="ebas_station_code" value="BE0007R" />
  <attribute name="ebas_platform_code" value="BE0007S" />
  <attribute name="ebas_station_name" value="Vielsalm" />
  <attribute name="ebas_station_latitude" type="double" value="50.304003" />
  <attribute name="ebas_station_longitude" type="double" value="6.001271" />
  <attribute name="ebas_station_altitude" value="487.0 m" />
  <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
  <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
  <attribute name="ebas_measurement_altitude" value="496.0 m" />
  <attribute name="ebas_measurement_height" value="3.5 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_unit" value="ug C/m3" />
  <attribute name="ebas_matrix" value="pm10" />
  <attribute name="ebas_laboratory_code" value="BE03L" />
  <attribute name="ebas_instrument_type" value="low_vol_sampler" />
  <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
  <attribute name="ebas_instrument_manufacturer" value="Leckel" />
  <attribute name="ebas_instrument_model" value="SEQ47/50" />
  <attribute name="ebas_instrument_serial_number" value="10-67" />
  <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
  <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
  <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
  <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
  <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
  <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
  <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
  <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
  <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
  <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
  <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
  <attribute name="ebas_medium" value="Quartz" />
  <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
  <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
  <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_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
  <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
  <attribute name="ebas_qa1_measure_id" value="ECAC-OCEC-2016-2" />
  <attribute name="ebas_qa1_date" value="2016-10-28T00:00:00Z" />
  <attribute name="ebas_qa1_document_name" value="Results of the inter-laboratory comparison exercise for TC and EC measurements (ref.: OCEC-2016-2)" />
  <attribute name="ebas_qa1_document_url" value="http://www.actris-ecac.eu/files/OCEC-2016-2-REPORT.pdf" />
  <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
  <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
  <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
  <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
  <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
  <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
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  <attribute name="Metadata_Conventions" value="Unidata Dataset Discovery v1.0" />
  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="standard_name_vocabulary" value="CF-1.7, ACDD-1.3" />
  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="33" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="qc_elemental_carbon_amean_flags" length="1" />
  <dimension name="qc_elemental_carbon_uncertainty_flags" length="1" />
  <dimension name="qc_organic_carbon_amean_flags" length="1" />
  <dimension name="qc_organic_carbon_uncertainty_flags" length="1" />
  <dimension name="d_Fraction" length="5" />
  <dimension name="qc_organic_carbon_amean_d_Fraction_flags" length="1" />
  <dimension name="qc_total_carbon_amean_flags" length="1" />
  <dimension name="qc_total_carbon_uncertainty_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2017-12-02T00:00:00Z" />
    <attribute name="time_coverage_end" value="2018-04-01T00:00:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="324000.0" />
    <attribute name="time_coverage_duration" value="P0Y0M120DT0H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-06-26" />
    <attribute name="nciso_version" value="2.4.8" />
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  <variable name="time_bnds" shape="time tbnds" type="double">
    <attribute name="long_name" value="time bounds for measurement" />
  </variable>
  <variable name="metadata_time_bnds" shape="metadata_time tbnds" type="double">
    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
  </variable>
  <variable name="v_elemental_carbon_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_elemental_carbon_in_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_elemental_carbon_amean meta_elemental_carbon_amean" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit" value="0.1 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleelementalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle elemental carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
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    <attribute name="actris_constraints_preferred_term" value="expressed as carbon, elemental" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
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    <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_elemental_carbon_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_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_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_elemental_carbon_uncertainty meta_elemental_carbon_uncertainty" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleelementalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle elemental carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon, https://vocabulary.actris.nilu.no/actris_vocab/elemental" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon, elemental" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_elemental_carbon_uncertainty" shape="qc_elemental_carbon_uncertainty_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_elemental_carbon_uncertainty" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_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_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_organic_carbon_amean meta_organic_carbon_amean" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit" value="0.1 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleorganiccarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle organic carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_organic_carbon_amean" shape="qc_organic_carbon_amean_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_organic_carbon_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_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_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_organic_carbon_uncertainty meta_organic_carbon_uncertainty" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleorganiccarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle organic carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_organic_carbon_uncertainty" shape="qc_organic_carbon_uncertainty_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_organic_carbon_uncertainty" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_organic_carbon_amean_d_Fraction" shape="d_Fraction time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_organic_carbon_in_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_organic_carbon_amean_d_Fraction meta_organic_carbon_amean_d_Fraction" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleorganiccarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle organic carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_organic_carbon_amean_d_Fraction" shape="d_Fraction qc_organic_carbon_amean_d_Fraction_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_organic_carbon_amean_d_Fraction" shape="d_Fraction metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_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_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_total_carbon_amean meta_total_carbon_amean" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit" value="0.1 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticletotalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle total carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_total_carbon_amean" shape="qc_total_carbon_amean_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_total_carbon_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_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_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
    <attribute name="ancillary_variables" value="qc_total_carbon_uncertainty meta_total_carbon_uncertainty" />
    <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="2018-06-25T00:00:00.000000Z" />
    <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="2d" />
    <attribute name="ebas_orig_time_res" value="2d" />
    <attribute name="ebas_station_code" value="BE0007R" />
    <attribute name="ebas_platform_code" value="BE0007S" />
    <attribute name="ebas_station_name" value="Vielsalm" />
    <attribute name="ebas_station_latitude" type="double" value="50.304003" />
    <attribute name="ebas_station_longitude" type="double" value="6.001271" />
    <attribute name="ebas_station_altitude" value="487.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="50.304003" />
    <attribute name="ebas_measurement_longitude" type="double" value="6.001271" />
    <attribute name="ebas_measurement_altitude" value="496.0 m" />
    <attribute name="ebas_measurement_height" value="3.5 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="pm10" />
    <attribute name="ebas_laboratory_code" value="BE03L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="ISSeP_lvs_be07_pm10" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="SEQ47/50" />
    <attribute name="ebas_instrument_serial_number" value="10-67" />
    <attribute name="ebas_analytical_laboratory_code" value="BE03L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="ISSeP_sunset_001" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5" />
    <attribute name="ebas_analytical_instrument_serial_number" value="345-137" />
    <attribute name="ebas_method_ref" value="BE03L_ISSeP_sunset_001" />
    <attribute name="ebas_standard_method" value="SOP=EMEP_manual_v2014, 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="38.3 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="12.6 cm2" />
    <attribute name="ebas_filter_description" value="Tissuquartz 2500 QAT-UP 47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 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="None" />
    <attribute name="ebas_artifact_correction_description" value="No artifact correction implemented - Based on previous campaign on same location positive sampling artefact of OC can be estimated to 20 % ± 18 %" />
    <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_detection_limit_expl" value="Determined by taking 3 times standard deviation of ensemble of field blanks" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Measurement uncertainty includes quantifiable uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit. flagged with 780" />
    <attribute name="ebas_organization" value="BE03L, Institut Scientifique de Service Public, ISSeP, , &quot;Rue Chéra, 200&quot;, , 4000, Liege, Belgium" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , Chemical On-Line cOmpoSition and Source Apportionment of fine aerosoL, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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.&quot;, , &quot;Assessment of fine atmospheric aerosols (PM2.5), ther spatial variability (across Europe), their temporal variability (1h or better), the seasonality, the phenomenology (chemical composition) and the sources.&quot;, &quot;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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Wenche Aas, Wenche Aas, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, waa@nilu.no, waa@nilu.no, Markus.Fiebig@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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_submitter" 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;FONSNY, Eric, fonsny@issep.be, Institut Scientifique de Service Public, ISSeP, Air quality, Rue du Chéra 200, , 4000, Liège, Belgium&quot;" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, CAMPAIGN, COLOSSAL, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticletotalcarbonmassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle total carbon mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/PM10" />
    <attribute name="actris_matrix_preferred_term" value="PM10" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
    <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/lowvolumesampler" />
    <attribute name="actris_instrument_type_preferred_term" value="low volume sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="P4D" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_total_carbon_uncertainty" shape="qc_total_carbon_uncertainty_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_total_carbon_uncertainty" 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>
  <variable name="d_Fraction" shape="d_Fraction" type="String" />
</netcdf>
