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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="PAHs (polycyclic aromatic hydrocarbons) at High Muffles" />
  <attribute name="summary" value="PAHs (polycyclic aromatic hydrocarbons) at High Muffles. These measurements are gathered as a part of the following projects CAMP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['anthanthrene in pm10 (mass_concentration_of_anthanthrene_in_pm10_in_air)', 'benz_a_anthracene in pm10 (mass_concentration_of_benz_a_anthracene_in_pm10_in_air)', 'benzo_a_pyrene in pm10 (mass_concentration_of_benzo_a_pyrene_in_pm10_in_air)', 'benzo_b_fluoranthene in pm10 (mass_concentration_of_benzo_b_fluoranthene_in_pm10_in_air)', 'benzo_e_pyrene in pm10 (mass_concentration_of_benzo_e_pyrene_in_pm10_in_air)', 'benzo_ghi_perylene in pm10 (mass_concentration_of_benzo_ghi_perylene_in_pm10_in_air)', 'benzo_j_fluoranthene in pm10 (mass_concentration_of_benzo_j_fluoranthene_in_pm10_in_air)', 'benzo_k_fluoranthene in pm10 (mass_concentration_of_benzo_k_fluoranthene_in_pm10_in_air)', 'chrysene in pm10 (mass_concentration_of_chrysene_in_pm10_in_air)', 'coronene in pm10 (mass_concentration_of_coronene_in_pm10_in_air)', 'cyclopenta_cd_pyrene in pm10 (mass_concentration_of_cyclopenta_cd_pyrene_in_pm10_in_air)', 'dibenzo_ac_anthracene in pm10 (mass_concentration_of_dibenzo_ac_anthracene_in_pm10_in_air)', 'dibenzo_ah_anthracene in pm10 (mass_concentration_of_dibenzo_ah_anthracene_in_pm10_in_air)', 'dibenzo_ai_pyrene in pm10 (mass_concentration_of_dibenzo_ai_pyrene_in_pm10_in_air)', 'inden_123cd_pyrene in pm10 (mass_concentration_of_inden_123cd_pyrene_in_pm10_in_air)', 'perylene in pm10 (mass_concentration_of_perylene_in_pm10_in_air)']" />
  <attribute name="keywords" value="&quot;High Muffles&quot; GB0014R anthanthrene benz_a_anthracene benzo_a_pyrene benzo_b_fluoranthene benzo_e_pyrene benzo_ghi_perylene benzo_j_fluoranthene benzo_k_fluoranthene chrysene coronene cyclopenta_cd_pyrene dibenzo_ac_anthracene dibenzo_ah_anthracene dibenzo_ai_pyrene inden_123cd_pyrene perylene pm10 CAMP mass_concentration_of_anthanthrene_in_pm10_in_air mass_concentration_of_benz_a_anthracene_in_pm10_in_air mass_concentration_of_benzo_a_pyrene_in_pm10_in_air mass_concentration_of_benzo_b_fluoranthene_in_pm10_in_air mass_concentration_of_benzo_e_pyrene_in_pm10_in_air mass_concentration_of_benzo_ghi_perylene_in_pm10_in_air mass_concentration_of_benzo_j_fluoranthene_in_pm10_in_air mass_concentration_of_benzo_k_fluoranthene_in_pm10_in_air mass_concentration_of_chrysene_in_pm10_in_air mass_concentration_of_coronene_in_pm10_in_air mass_concentration_of_cyclopenta_cd_pyrene_in_pm10_in_air mass_concentration_of_dibenzo_ac_anthracene_in_pm10_in_air mass_concentration_of_dibenzo_ah_anthracene_in_pm10_in_air mass_concentration_of_dibenzo_ai_pyrene_in_pm10_in_air mass_concentration_of_inden_123cd_pyrene_in_pm10_in_air mass_concentration_of_perylene_in_pm10_in_air" />
  <attribute name="id" value="GAP4-RH4B.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="CAMP" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/GAP4-RH4B" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Christopher, C., CAMP, 2026, PAHs (polycyclic aromatic hydrocarbons) at High Muffles, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/GAP4-RH4B" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="GB02L &quot;AEA Technology, National Environmental Techn. Centre&quot; &quot;Culham Abington, OXFORDSHIRE OX14 3DB, United Kingdom&quot;" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-19T14:30:00.446368Z" />
  <attribute name="date_metadata_modified" value="2026-06-19T14:30:00Z" />
  <attribute name="creator_name" value="Conolly Christopher" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="Keith Vincent" />
  <attribute name="contributor_role" value="data submitter" />
  <attribute name="publisher_type" value="institution" />
  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (-0.8075 54.334444 267)" />
  <attribute name="geospatial_lat_min" type="double" value="54.334444" />
  <attribute name="geospatial_lat_max" type="double" value="54.334444" />
  <attribute name="geospatial_lon_min" type="double" value="-0.8075" />
  <attribute name="geospatial_lon_max" type="double" value="-0.8075" />
  <attribute name="geospatial_vertical_min" type="double" value="267.0" />
  <attribute name="geospatial_vertical_max" type="double" value="267.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2016-01-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2025-01-01T00:00:00Z" />
  <attribute name="time_coverage_duration" value="P0009-00-00T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-01-00T00:00:00" />
  <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="Christopher, C., CAMP, 2026, PAHs (polycyclic aromatic hydrocarbons) at High Muffles, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/GAP4-RH4B" />
  <attribute name="ebas_set_type_code" value="TI" />
  <attribute name="ebas_timezone" value="UTC" />
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  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/GAP4-RH4B" />
  <attribute name="ebas_file_creation" value="2026-06-19T14:36:09.741808Z" />
  <attribute name="ebas_export_state" value="2026-06-19T14:30:00.446368Z" />
  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="2016-01-01T00:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2026-06-19T14:30:00.446368Z" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="9y" />
  <attribute name="ebas_resolution_code" value="1mo" />
  <attribute name="ebas_station_code" value="GB0014R" />
  <attribute name="ebas_platform_code" value="GB0014S" />
  <attribute name="ebas_station_name" value="High Muffles" />
  <attribute name="ebas_station_latitude" type="double" value="54.334444" />
  <attribute name="ebas_station_longitude" type="double" value="-0.8075" />
  <attribute name="ebas_station_altitude" value="267.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_unit" value="ng/m3" />
  <attribute name="ebas_matrix" value="pm10" />
  <attribute name="ebas_laboratory_code" value="GB02L" />
  <attribute name="ebas_instrument_type" value="high_vol_sampler" />
  <attribute name="ebas_instrument_name" value="GB_Digitel_14" />
  <attribute name="ebas_method_ref" value="GB02L_PAH_air" />
  <attribute name="ebas_organization" value="GB02L, &quot;AEA Technology, National Environmental Techn. Centre&quot;, , , &quot;Culham Abington, OXFORDSHIRE OX14 3DB, United Kingdom&quot;, , , , " />
  <attribute name="ebas_framework_acronym" value="CAMP" />
  <attribute name="ebas_framework_name" value="OSPARCOM - Comprehensive Atmospheric Monitoring Programme" />
  <attribute name="ebas_framework_description" value="The OSPARCOM Comprehensive Atmospheric Monitoring Programme goal is the assessment of the atmospheric input of selected contaminants to the OSPAR maritime area and regions." />
  <attribute name="ebas_framework_contact_name" value="Wenche Aas" />
  <attribute name="ebas_framework_contact_email" value="waa@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Christopher, Conolly, , , , , , , , , &quot;" />
  <attribute name="ebas_submitter" value="&quot;Vincent, Keith, , , , , , , , , &quot;" />
  <attribute name="_NCProperties" value="version=2,netcdf=4.9.3,hdf5=1.14.6" />
  <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="96" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="8" />
  <dimension name="qc_anthanthrene_flags" length="1" />
  <dimension name="qc_benz_a_anthracene_flags" length="1" />
  <dimension name="qc_benzo_a_pyrene_flags" length="1" />
  <dimension name="qc_benzo_b_fluoranthene_flags" length="1" />
  <dimension name="qc_benzo_e_pyrene_flags" length="1" />
  <dimension name="qc_benzo_ghi_perylene_flags" length="1" />
  <dimension name="qc_benzo_j_fluoranthene_flags" length="1" />
  <dimension name="qc_benzo_k_fluoranthene_flags" length="1" />
  <dimension name="qc_chrysene_flags" length="1" />
  <dimension name="qc_coronene_flags" length="1" />
  <dimension name="qc_cyclopenta_cd_pyrene_flags" length="1" />
  <dimension name="qc_dibenzo_ac_anthracene_flags" length="1" />
  <dimension name="qc_dibenzo_ah_anthracene_flags" length="1" />
  <dimension name="qc_dibenzo_ai_pyrene_flags" length="1" />
  <dimension name="qc_inden_123cd_pyrene_flags" length="1" />
  <dimension name="qc_perylene_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2016-01-16T12:00:00Z" />
    <attribute name="time_coverage_end" value="2024-12-16T12:00:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="2962155.0" />
    <attribute name="time_coverage_duration" value="P0Y0M3257DT0H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-06-26" />
    <attribute name="nciso_version" value="2.4.8" />
  </group>
  <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_anthanthrene" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_anthanthrene_in_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_anthanthrene meta_anthanthrene" />
    <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="2026-06-19T14:30:00.446368Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_station_code" value="GB0014R" />
    <attribute name="ebas_platform_code" value="GB0014S" />
    <attribute name="ebas_station_name" value="High Muffles" />
    <attribute name="ebas_station_latitude" type="double" value="54.334444" />
    <attribute name="ebas_station_longitude" type="double" value="-0.8075" />
    <attribute name="ebas_station_altitude" value="267.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="anthanthrene" />
    <attribute name="ebas_unit" value="ng/m3" />
    <attribute name="ebas_matrix" value="pm10" />
    <attribute name="ebas_laboratory_code" value="GB02L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="GB_Digitel_14" />
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    <attribute name="ebas_framework_acronym" value="CAMP" />
    <attribute name="ebas_framework_name" value="OSPARCOM - Comprehensive Atmospheric Monitoring Programme" />
    <attribute name="ebas_framework_description" value="The OSPARCOM Comprehensive Atmospheric Monitoring Programme goal is the assessment of the atmospheric input of selected contaminants to the OSPAR maritime area and regions." />
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    <attribute name="actris_variable_preferred_term" value="aerosol particle anthanthrene mass concentration" />
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="ancillary_variables" value="qc_benz_a_anthracene meta_benz_a_anthracene" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_platform_code" value="GB0014S" />
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    <attribute name="actris_variable_preferred_term" value="aerosol particle benzanthracene mass concentration" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_benzo_a_pyrene" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_benzo_a_pyrene_in_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_benzo_a_pyrene meta_benzo_a_pyrene" />
    <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="2026-06-19T14:30:00.446368Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_station_code" value="GB0014R" />
    <attribute name="ebas_platform_code" value="GB0014S" />
    <attribute name="ebas_station_name" value="High Muffles" />
    <attribute name="ebas_station_latitude" type="double" value="54.334444" />
    <attribute name="ebas_station_longitude" type="double" value="-0.8075" />
    <attribute name="ebas_station_altitude" value="267.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="benzo_a_pyrene" />
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    <attribute name="ebas_framework_acronym" value="CAMP" />
    <attribute name="ebas_framework_name" value="OSPARCOM - Comprehensive Atmospheric Monitoring Programme" />
    <attribute name="ebas_framework_description" value="The OSPARCOM Comprehensive Atmospheric Monitoring Programme goal is the assessment of the atmospheric input of selected contaminants to the OSPAR maritime area and regions." />
    <attribute name="ebas_framework_contact_name" value="Wenche Aas" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no" />
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    <attribute name="ebas_submitter" value="&quot;Vincent, Keith, , , , , , , , , &quot;" />
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    <attribute name="ebas_regime" value="IMG" />
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  <variable name="qc_dibenzo_ai_pyrene" shape="qc_dibenzo_ai_pyrene_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" />
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  <variable name="meta_dibenzo_ai_pyrene" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_inden_123cd_pyrene" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_inden_123cd_pyrene_in_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_inden_123cd_pyrene meta_inden_123cd_pyrene" />
    <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="2026-06-19T14:30:00.446368Z" />
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    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_station_code" value="GB0014R" />
    <attribute name="ebas_platform_code" value="GB0014S" />
    <attribute name="ebas_station_name" value="High Muffles" />
    <attribute name="ebas_station_latitude" type="double" value="54.334444" />
    <attribute name="ebas_station_longitude" type="double" value="-0.8075" />
    <attribute name="ebas_station_altitude" value="267.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="inden_123cd_pyrene" />
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    <attribute name="ebas_matrix" value="pm10" />
    <attribute name="ebas_laboratory_code" value="GB02L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="GB_Digitel_14" />
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    <attribute name="ebas_framework_acronym" value="CAMP" />
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    <attribute name="ebas_framework_contact_name" value="Wenche Aas" />
    <attribute name="ebas_framework_contact_email" value="waa@nilu.no" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleindeno-1-2-3-cdpyrenemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle indeno(1,2,3-cd)pyrene mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="PM10" />
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    <attribute name="actris_timeliness_preferred_term" value="scheduled" />
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    <attribute name="actris_framework_preferred_term" value="CAMP" />
    <attribute name="actris_temporal_resolution" value="P1M" />
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  <variable name="qc_inden_123cd_pyrene" shape="qc_inden_123cd_pyrene_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_inden_123cd_pyrene" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_perylene" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_perylene_in_pm10_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="qc_perylene meta_perylene" />
    <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="2026-06-19T14:30:00.446368Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_station_code" value="GB0014R" />
    <attribute name="ebas_platform_code" value="GB0014S" />
    <attribute name="ebas_station_name" value="High Muffles" />
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    <attribute name="ebas_station_longitude" type="double" value="-0.8075" />
    <attribute name="ebas_station_altitude" value="267.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="perylene" />
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    <attribute name="ebas_laboratory_code" value="GB02L" />
    <attribute name="ebas_instrument_type" value="high_vol_sampler" />
    <attribute name="ebas_instrument_name" value="GB_Digitel_14" />
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    <attribute name="actris_variable_preferred_term" value="aerosol particle perylene mass concentration" />
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  <variable name="qc_perylene" shape="qc_perylene_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_perylene" 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" />
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    <attribute name="units" value="days since 1900-01-01T00:00:00Z" />
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</netcdf>
