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  <attribute name="title" value="OC/EC at Monte Martano" />
  <attribute name="summary" value="OC/EC at Monte Martano. These measurements are gathered as a part of the following projects EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['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)', 'total_carbon in pm25 (mass_concentration_of_total_carbon_in_pm2p5_in_air)']" />
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    <attribute name="ebas_analytical_instrument_name" value="Carbon_Aerosol_Analyzer_1" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="Carbon Aerosol Analyzer" />
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    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="Not prefired" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="The detection limit is calculated as 3 times the standard deviation of the fieldblanks." />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may not appear" />
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    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme" />
    <attribute name="ebas_framework_description" value="The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems." />
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    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Vecchiocattivi, Marco, m.vecchiocattivi@arpa.umbria.it, Arpa Umbria - Umbria Regional Agency for Environmental Protection, ARPA-Umbria, Sezione chimica Aria, Via Pievaiola 207/B-3, , 06132, Perugia, Italy&quot;" />
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    <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" />
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    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon, https://vocabulary.actris.nilu.no/actris_vocab/elemental" />
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    <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="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_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug C/m3" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-04-16T10:25:36.739511Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_station_code" value="IT0019R" />
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    <attribute name="ebas_station_name" value="Monte Martano" />
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    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_latitude" type="double" value="42.805462" />
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    <attribute name="ebas_station_altitude" value="1090.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="42.805462" />
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    <attribute name="ebas_measurement_altitude" value="1092.0 m" />
    <attribute name="ebas_measurement_height" value="3.2 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" />
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    <attribute name="ebas_filter_prefiring" value="Not prefired" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
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    <attribute name="ebas_volume_std_pressure" value="ambient" />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may not appear" />
    <attribute name="ebas_qa1_bias" value="0.4 %" />
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    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="organic_carbon" />
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    <attribute name="ebas_analytical_laboratory_code" value="IT15L" />
    <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="Carbon Aerosol Analyzer" />
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    <attribute name="ebas_method_ref" value="IT15L_Carbon_Aerosol_Analyzer_1" />
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    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_flow_rate" value="38.33 l/min" />
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    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="Not prefired" />
    <attribute name="ebas_filter_conditioning" value="None" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="The detection limit is calculated as 3 times the standard deviation of the fieldblanks." />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative impossible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may not appear" />
    <attribute name="ebas_organization" value="IT15L, Arpa Umbria - Umbria Regional Agency for Environmental Protection, ARPA-Umbria, , Via Pievaiola 207/B-3, , 06132, Perugia, Italy" />
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    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme" />
    <attribute name="ebas_framework_description" value="The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems." />
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    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
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    <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/PM2.5" />
    <attribute name="actris_matrix_preferred_term" value="PM2.5" />
    <attribute name="actris_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedascarbon" />
    <attribute name="actris_constraints_preferred_term" value="expressed as carbon" />
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  <variable name="qc_organic_carbon_amean_d_Fraction" shape="d_Fraction qc_organic_carbon_amean_d_Fraction_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </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_pm2p5_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-04-16T10:25:36.739511Z" />
    <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" />
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    <attribute name="ebas_platform_code" value="IT0019S" />
    <attribute name="ebas_station_name" value="Monte Martano" />
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    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_latitude" type="double" value="42.805462" />
    <attribute name="ebas_station_longitude" type="double" value="12.565645" />
    <attribute name="ebas_station_altitude" value="1090.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="42.805462" />
    <attribute name="ebas_measurement_longitude" type="double" value="12.565645" />
    <attribute name="ebas_measurement_altitude" value="1092.0 m" />
    <attribute name="ebas_measurement_height" value="3.2 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_filter_prefiring" value="Not prefired" />
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    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <attribute name="ebas_charring_correction" value="By laser transmission" />
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    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.5 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="The detection limit is calculated as 3 times the standard deviation of the fieldblanks." />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may not appear" />
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    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
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    <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" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="uncertainty" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="total_carbon" />
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    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
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    <attribute name="calendar" value="standard" />
    <attribute name="bounds" value="time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
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  <variable name="metadata_time" shape="metadata_time" type="double">
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    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
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    <attribute name="calendar" value="standard" />
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    <attribute name="_CoordinateAxisType" value="Time" />
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