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  <attribute name="title" value="OC/EC at Barcelona (Palau Reial)" />
  <attribute name="summary" value="OC/EC at Barcelona (Palau Reial). These measurements are gathered as a part of the following projects ACTRIS, RI-URBANS and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['elemental_carbon in pm1 (mass_concentration_of_elemental_carbon_in_pm1_in_air)', 'organic_carbon in pm1 (mass_concentration_of_organic_carbon_in_pm1_in_air)', 'total_carbon in pm1 (mass_concentration_of_total_carbon_in_pm1_in_air)']" />
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    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="500.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="54.1 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="154.0 cm2" />
    <attribute name="ebas_filter_description" value="Pall Tissuquartz 2500QAT-UP" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="473.15 K, 4.0 h" />
    <attribute name="ebas_filter_conditioning" value="293.15 K, 50.0 %RH, 48.0 h" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <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="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="LOD provided by the instrumental manufacturer was used" />
    <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="ES05L, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, , Jordi Girona 18-26, , 08034, Barcelona, Spain" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, RI-URBANS" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, RI-URBANS" />
    <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;, " />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Alastuey, Andres, , , , , , , , , &quot;, &quot;Perez, Noemi, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Perez, Noemi, , , , , , , , , &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, RI-URBANS. 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/PM1" />
    <attribute name="actris_matrix_preferred_term" value="PM1" />
    <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/highvolumefiltersampler" />
    <attribute name="actris_instrument_type_preferred_term" value="high volume filter sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/RI-URBANS" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, RI-URBANS" />
    <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_pm1_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="2026-05-22T00:00:00.000000Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="4d" />
    <attribute name="ebas_station_code" value="ES0019U" />
    <attribute name="ebas_platform_code" value="ES0019S" />
    <attribute name="ebas_station_name" value="Barcelona (Palau Reial)" />
    <attribute name="ebas_station_land_use" value="Urban park" />
    <attribute name="ebas_station_setting" value="Urban and center city" />
    <attribute name="ebas_station_latitude" type="double" value="41.387463" />
    <attribute name="ebas_station_longitude" type="double" value="2.11532" />
    <attribute name="ebas_station_altitude" value="80.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="41.387567" />
    <attribute name="ebas_measurement_longitude" type="double" value="2.114715" />
    <attribute name="ebas_measurement_altitude" value="130.0 m" />
    <attribute name="ebas_measurement_height" value="4.0 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="pm1" />
    <attribute name="ebas_laboratory_code" value="ES05L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="HVS_MCV_BCN_pm1" />
    <attribute name="ebas_instrument_manufacturer" value="MCV" />
    <attribute name="ebas_instrument_model" value="CAV-A/MSb" />
    <attribute name="ebas_analytical_laboratory_code" value="ES05L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Sunset_IDAEA" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="2011516240" />
    <attribute name="ebas_method_ref" value="ES05L_OCEC_Sunset_IDAEA" />
    <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="500.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="54.1 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="154.0 cm2" />
    <attribute name="ebas_filter_description" value="Pall Tissuquartz 2500QAT-UP" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="473.15 K, 4.0 h" />
    <attribute name="ebas_filter_conditioning" value="293.15 K, 50.0 %RH, 48.0 h" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <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="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.04 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="LOD provided by the instrumental manufacturer was used" />
    <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="ES05L, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, , Jordi Girona 18-26, , 08034, Barcelona, Spain" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, RI-URBANS" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, RI-URBANS" />
    <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;, " />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Alastuey, Andres, , , , , , , , , &quot;, &quot;Perez, Noemi, , , , , , , , , &quot;" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, RI-URBANS. 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/PM1" />
    <attribute name="actris_matrix_preferred_term" value="PM1" />
    <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/highvolumefiltersampler" />
    <attribute name="actris_instrument_type_preferred_term" value="high volume filter sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/RI-URBANS" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, RI-URBANS" />
    <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_pm1_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="2026-05-22T00:00:00.000000Z" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="4d" />
    <attribute name="ebas_station_code" value="ES0019U" />
    <attribute name="ebas_platform_code" value="ES0019S" />
    <attribute name="ebas_station_name" value="Barcelona (Palau Reial)" />
    <attribute name="ebas_station_land_use" value="Urban park" />
    <attribute name="ebas_station_setting" value="Urban and center city" />
    <attribute name="ebas_station_latitude" type="double" value="41.387463" />
    <attribute name="ebas_station_longitude" type="double" value="2.11532" />
    <attribute name="ebas_station_altitude" value="80.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="41.387567" />
    <attribute name="ebas_measurement_longitude" type="double" value="2.114715" />
    <attribute name="ebas_measurement_altitude" value="130.0 m" />
    <attribute name="ebas_measurement_height" value="4.0 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="pm1" />
    <attribute name="ebas_laboratory_code" value="ES05L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="HVS_MCV_BCN_pm1" />
    <attribute name="ebas_instrument_manufacturer" value="MCV" />
    <attribute name="ebas_instrument_model" value="CAV-A/MSb" />
    <attribute name="ebas_analytical_laboratory_code" value="ES05L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Sunset_IDAEA" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5L" />
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    <attribute name="ebas_method_ref" value="ES05L_OCEC_Sunset_IDAEA" />
    <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="500.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="54.1 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="154.0 cm2" />
    <attribute name="ebas_filter_description" value="Pall Tissuquartz 2500QAT-UP" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="473.15 K, 4.0 h" />
    <attribute name="ebas_filter_conditioning" value="293.15 K, 50.0 %RH, 48.0 h" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <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="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="LOD provided by the instrumental manufacturer was used" />
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    <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="ES05L, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, , Jordi Girona 18-26, , 08034, Barcelona, Spain" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, RI-URBANS" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, RI-URBANS" />
    <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;, " />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Alastuey, Andres, , , , , , , , , &quot;, &quot;Perez, Noemi, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Perez, Noemi, , , , , , , , , &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, RI-URBANS. 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/PM1" />
    <attribute name="actris_matrix_preferred_term" value="PM1" />
    <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/highvolumefiltersampler" />
    <attribute name="actris_instrument_type_preferred_term" value="high volume filter sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/RI-URBANS" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, RI-URBANS" />
    <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" />
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    <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_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_pm1_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="2026-05-22T00:00:00.000000Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="4d" />
    <attribute name="ebas_station_code" value="ES0019U" />
    <attribute name="ebas_platform_code" value="ES0019S" />
    <attribute name="ebas_station_name" value="Barcelona (Palau Reial)" />
    <attribute name="ebas_station_land_use" value="Urban park" />
    <attribute name="ebas_station_setting" value="Urban and center city" />
    <attribute name="ebas_station_latitude" type="double" value="41.387463" />
    <attribute name="ebas_station_longitude" type="double" value="2.11532" />
    <attribute name="ebas_station_altitude" value="80.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="41.387567" />
    <attribute name="ebas_measurement_longitude" type="double" value="2.114715" />
    <attribute name="ebas_measurement_altitude" value="130.0 m" />
    <attribute name="ebas_measurement_height" value="4.0 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="pm1" />
    <attribute name="ebas_laboratory_code" value="ES05L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="HVS_MCV_BCN_pm1" />
    <attribute name="ebas_instrument_manufacturer" value="MCV" />
    <attribute name="ebas_instrument_model" value="CAV-A/MSb" />
    <attribute name="ebas_analytical_laboratory_code" value="ES05L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Sunset_IDAEA" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="2011516240" />
    <attribute name="ebas_method_ref" value="ES05L_OCEC_Sunset_IDAEA" />
    <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="500.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="54.1 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="154.0 cm2" />
    <attribute name="ebas_filter_description" value="Pall Tissuquartz 2500QAT-UP" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="473.15 K, 4.0 h" />
    <attribute name="ebas_filter_conditioning" value="293.15 K, 50.0 %RH, 48.0 h" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <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="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.04 ug C/m3" />
    <attribute name="ebas_detection_limit_expl" value="LOD provided by the instrumental manufacturer was used" />
    <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="ES05L, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, , Jordi Girona 18-26, , 08034, Barcelona, Spain" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, RI-URBANS" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, RI-URBANS" />
    <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;, " />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Alastuey, Andres, , , , , , , , , &quot;, &quot;Perez, Noemi, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Perez, Noemi, , , , , , , , , &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, RI-URBANS. 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/PM1" />
    <attribute name="actris_matrix_preferred_term" value="PM1" />
    <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/highvolumefiltersampler" />
    <attribute name="actris_instrument_type_preferred_term" value="high volume filter sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/RI-URBANS" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, RI-URBANS" />
    <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_pm1_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="2026-05-22T00:00:00.000000Z" />
    <attribute name="ebas_statistics" value="uncertainty" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1d" />
    <attribute name="ebas_orig_time_res" value="4d" />
    <attribute name="ebas_station_code" value="ES0019U" />
    <attribute name="ebas_platform_code" value="ES0019S" />
    <attribute name="ebas_station_name" value="Barcelona (Palau Reial)" />
    <attribute name="ebas_station_land_use" value="Urban park" />
    <attribute name="ebas_station_setting" value="Urban and center city" />
    <attribute name="ebas_station_latitude" type="double" value="41.387463" />
    <attribute name="ebas_station_longitude" type="double" value="2.11532" />
    <attribute name="ebas_station_altitude" value="80.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="41.387567" />
    <attribute name="ebas_measurement_longitude" type="double" value="2.114715" />
    <attribute name="ebas_measurement_altitude" value="130.0 m" />
    <attribute name="ebas_measurement_height" value="4.0 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="pm1" />
    <attribute name="ebas_laboratory_code" value="ES05L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="HVS_MCV_BCN_pm1" />
    <attribute name="ebas_instrument_manufacturer" value="MCV" />
    <attribute name="ebas_instrument_model" value="CAV-A/MSb" />
    <attribute name="ebas_analytical_laboratory_code" value="ES05L" />
    <attribute name="ebas_analytical_measurement_technique" value="thermal-optical_analysis" />
    <attribute name="ebas_analytical_instrument_name" value="OCEC_Sunset_IDAEA" />
    <attribute name="ebas_analytical_instrument_manufacturer" value="Sunset Laboratory" />
    <attribute name="ebas_analytical_instrument_model" value="OCEC Lab Instrument Model 5L" />
    <attribute name="ebas_analytical_instrument_serial_number" value="2011516240" />
    <attribute name="ebas_method_ref" value="ES05L_OCEC_Sunset_IDAEA" />
    <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="500.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="54.1 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="154.0 cm2" />
    <attribute name="ebas_filter_description" value="Pall Tissuquartz 2500QAT-UP" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="473.15 K, 4.0 h" />
    <attribute name="ebas_filter_conditioning" value="293.15 K, 50.0 %RH, 48.0 h" />
    <attribute name="ebas_sample_preparation" value="None" />
    <attribute name="ebas_blank_correction" value="Blank corrected" />
    <attribute name="ebas_artifact_correction" value="None" />
    <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="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit_expl" value="LOD provided by the instrumental manufacturer was used" />
    <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="ES05L, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, , Jordi Girona 18-26, , 08034, Barcelona, Spain" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, RI-URBANS" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, RI-URBANS" />
    <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;, " />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Alastuey, Andres, , , , , , , , , &quot;, &quot;Perez, Noemi, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Perez, Noemi, , , , , , , , , &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, RI-URBANS. 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/PM1" />
    <attribute name="actris_matrix_preferred_term" value="PM1" />
    <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/highvolumefiltersampler" />
    <attribute name="actris_instrument_type_preferred_term" value="high volume filter sampler" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/RI-URBANS" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, RI-URBANS" />
    <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>
</netcdf>
