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  <attribute name="title" value="Aerosol_absorption_coefficient at Zeppelin mountain (Ny-Ålesund)" />
  <attribute name="summary" value="Aerosol_absorption_coefficient at Zeppelin mountain (Ny-Ålesund). These measurements are gathered as a part of the following projects ACTRIS, EMEP, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['pressure in instrument', 'temperature in instrument', 'aerosol_absorption_coefficient in aerosol (volume_absorption_coefficient_in_air_due_to_dried_aerosol_particles)']" />
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  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/T42R-HX2B" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Lunder, C., Duflot, V., ACTRIS, EMEP, GAW-WDCA, 2026, Aerosol_absorption_coefficient at Zeppelin mountain (Ny-Ålesund), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/T42R-HX2B" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="NO01L &quot;Norwegian Institute for Air Research&quot; NILU &quot;Instituttveien 18&quot; 2007 Kjeller Norway" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-03-20T12:18:10.958521Z" />
  <attribute name="date_metadata_modified" value="2026-03-20T12:04:50Z" />
  <attribute name="creator_name" value="Chris Lunder, Valentin Duflot" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="crl@nilu.no, vduf@nilu.no" />
  <attribute name="creator_institution" value="&quot;Norwegian Institute for Air Research, Atmosphere and Climate Department, NILU&quot;, &quot;Norwegian Institute for Air Research, Atmosphere and Climate Department, NILU&quot;" />
  <attribute name="contributor_name" value="Are Backlund, Anne Hjellbrekke" />
  <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/" />
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  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2025-01-01T00:00:00Z" />
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  <attribute name="timezone" value="UTC" />
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  <attribute name="ebas_citation" value="Lunder, C., Duflot, V., ACTRIS, EMEP, GAW-WDCA, 2026, Aerosol_absorption_coefficient at Zeppelin mountain (Ny-Ålesund), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/T42R-HX2B" />
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  <attribute name="ebas_file_creation" value="2026-04-28T00:55:39.088585Z" />
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  <attribute name="ebas_station_gaw_name" value="Zeppelin Mountain (Ny Ålesund)" />
  <attribute name="ebas_station_land_use" value="Gravel and stone" />
  <attribute name="ebas_station_setting" value="Polar" />
  <attribute name="ebas_station_gaw_type" value="G" />
  <attribute name="ebas_station_wmo_region" type="long" value="6" />
  <attribute name="ebas_station_latitude" type="double" value="78.90715" />
  <attribute name="ebas_station_longitude" type="double" value="11.88668" />
  <attribute name="ebas_station_altitude" value="474.0 m" />
  <attribute name="ebas_measurement_latitude" type="double" value="78.90669" />
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  <attribute name="ebas_measurement_altitude" value="475.0 m" />
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  <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
  <attribute name="ebas_instrument_name" value="Magee_AE33_ZEP_dry" />
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  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="Vertical inlet tube with head and main flow, equipped with take-offs." />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_humidity_temperaure_control_description" value="passive, sample heated from atmospheric to lab temperature" />
  <attribute name="ebas_volume_std_temperature" value="273.15 K" />
  <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
  <attribute name="ebas_measurement_uncertainty_expl" value="typical value of unit-to-unit variability" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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  <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme, 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;, 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., &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, Kjetil Tørseth, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Lunder, Chris, crl@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&quot;, &quot;Duflot, Valentin, vduf@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2027, Kjeller, Norway&quot;" />
  <attribute name="ebas_submitter" value="&quot;Backlund, Are, abe@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , N-2027, Kjeller, Norway&quot;, &quot;Hjellbrekke, Anne, agh@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&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, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
  <attribute name="ebas_comment" value="Absorption calculated using MAC=18.47, 14.54, 13.14, 11.58, 10.35, 7.77, 7.19 m2/g, setting b_abs=eBC*MAC/H*; where H*=2.21, corresponding to filter type M8020. Instrument settings: C=1.57, Z=0.01" />
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  <attribute name="history" value="None" />
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  <dimension name="time" length="8760" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="d_Location" length="1" />
  <dimension name="qc_pressure_flags" length="2" />
  <dimension name="qc_temperature_flags" length="2" />
  <dimension name="d_Wavelength" length="7" />
  <dimension name="qc_aerosol_absorption_coefficient_amean_flags" length="2" />
  <dimension name="qc_aerosol_absorption_coefficient_prec1587_flags" length="2" />
  <dimension name="qc_aerosol_absorption_coefficient_perc8413_flags" length="2" />
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    <attribute name="time_coverage_start" value="2025-01-01T00:30:00Z" />
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    <attribute name="metadata_creation" value="2026-05-17" />
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    <attribute name="long_name" value="time bounds for measurement" />
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    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_station_setting" value="Polar" />
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    <attribute name="ebas_inlet_description" value="Vertical inlet tube with head and main flow, equipped with take-offs." />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="passive, sample heated from atmospheric to lab temperature" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Markus Fiebig" />
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    <attribute name="ebas_comment" value="Absorption calculated using MAC=18.47, 14.54, 13.14, 11.58, 10.35, 7.77, 7.19 m2/g, setting b_abs=eBC*MAC/H*; where H*=2.21, corresponding to filter type M8020. Instrument settings: C=1.57, Z=0.01" />
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    <attribute name="ebas_inlet_description" value="Vertical inlet tube with head and main flow, equipped with take-offs." />
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    <attribute name="ebas_humidity_temperaure_control_description" value="passive, sample heated from atmospheric to lab temperature" />
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    <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;, 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., &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, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Lunder, Chris, crl@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&quot;, &quot;Duflot, Valentin, vduf@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2027, Kjeller, Norway&quot;" />
    <attribute name="ebas_submitter" value="&quot;Backlund, Are, abe@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , N-2027, Kjeller, Norway&quot;, &quot;Hjellbrekke, Anne, agh@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&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, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Absorption calculated using MAC=18.47, 14.54, 13.14, 11.58, 10.35, 7.77, 7.19 m2/g, setting b_abs=eBC*MAC/H*; where H*=2.21, corresponding to filter type M8020. Instrument settings: C=1.57, Z=0.01" />
  </variable>
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    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_temperature" shape="d_Location metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_aerosol_absorption_coefficient_amean" shape="d_Wavelength time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="volume_absorption_coefficient_in_air_due_to_dried_aerosol_particles" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="1/Mm" />
    <attribute name="ancillary_variables" value="v_aerosol_absorption_coefficient_amean_qc v_aerosol_absorption_coefficient_amean_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-03-20T12:04:50.000000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision -- Processing lev1-lev2: process_lev1_lev2_general V.1.02.00" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1s" />
    <attribute name="ebas_station_code" value="NO0042G" />
    <attribute name="ebas_platform_code" value="NO0042S" />
    <attribute name="ebas_station_name" value="Zeppelin mountain (Ny-Ålesund)" />
    <attribute name="ebas_station_wdca_id" value="GAWANO__ZEP" />
    <attribute name="ebas_station_gaw_id" value="ZEP" />
    <attribute name="ebas_station_gaw_name" value="Zeppelin Mountain (Ny Ålesund)" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Polar" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="6" />
    <attribute name="ebas_station_latitude" type="double" value="78.90715" />
    <attribute name="ebas_station_longitude" type="double" value="11.88668" />
    <attribute name="ebas_station_altitude" value="474.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="78.90669" />
    <attribute name="ebas_measurement_longitude" type="double" value="11.88934" />
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    <attribute name="ebas_measurement_height" value="4.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="aerosol_absorption_coefficient" />
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    <attribute name="ebas_matrix" value="aerosol" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Vertical inlet tube with head and main flow, equipped with take-offs." />
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    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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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, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Absorption calculated using MAC=18.47, 14.54, 13.14, 11.58, 10.35, 7.77, 7.19 m2/g, setting b_abs=eBC*MAC/H*; where H*=2.21, corresponding to filter type M8020. Instrument settings: C=1.57, Z=0.01" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlelightabsorptioncoefficient" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle light absorption coefficient" />
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    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="qc_aerosol_absorption_coefficient_amean" shape="d_Wavelength qc_aerosol_absorption_coefficient_amean_flags time" type="int">
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  <variable name="meta_aerosol_absorption_coefficient_amean" shape="d_Wavelength metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_aerosol_absorption_coefficient_prec1587" shape="d_Wavelength time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="ebas_comment" value="Absorption calculated using MAC=18.47, 14.54, 13.14, 11.58, 10.35, 7.77, 7.19 m2/g, setting b_abs=eBC*MAC/H*; where H*=2.21, corresponding to filter type M8020. Instrument settings: C=1.57, Z=0.01" />
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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_measurement_uncertainty_expl" value="typical value of unit-to-unit variability" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme, 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;, 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., &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, Kjetil Tørseth, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Lunder, Chris, crl@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&quot;, &quot;Duflot, Valentin, vduf@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2027, Kjeller, Norway&quot;" />
    <attribute name="ebas_submitter" value="&quot;Backlund, Are, abe@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , N-2027, Kjeller, Norway&quot;, &quot;Hjellbrekke, Anne, agh@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&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, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Absorption calculated using MAC=18.47, 14.54, 13.14, 11.58, 10.35, 7.77, 7.19 m2/g, setting b_abs=eBC*MAC/H*; where H*=2.21, corresponding to filter type M8020. Instrument settings: C=1.57, Z=0.01" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlelightabsorptioncoefficient" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle light absorption coefficient" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlephase" />
    <attribute name="actris_matrix_preferred_term" value="aerosol particle phase" />
    <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/filterabsorptionphotometer" />
    <attribute name="actris_instrument_type_preferred_term" value="filter absorption photometer" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, EMEP, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_aerosol_absorption_coefficient_perc8413" shape="d_Wavelength qc_aerosol_absorption_coefficient_perc8413_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_aerosol_absorption_coefficient_perc8413" shape="d_Wavelength 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_Location" shape="d_Location" type="String" />
  <variable name="d_Wavelength" shape="d_Wavelength" type="double" />
</netcdf>
