<?xml version="1.0" encoding="UTF-8"?>
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2" location="Not provided because of security concerns.">
  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Aerosol_absorption_coefficient at BEO Moussala" />
  <attribute name="summary" value="Aerosol_absorption_coefficient at BEO Moussala. These measurements are gathered as a part of the following projects ACTRIS, GAW-WDCA, NOAA-ESRL and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['temperature in instrument', 'aerosol_absorption_coefficient in aerosol (volume_absorption_coefficient_in_air_due_to_dried_aerosol_particles)']" />
  <attribute name="keywords" value="&quot;BEO Moussala&quot; BG0001R aerosol_absorption_coefficient aerosol ACTRIS GAW-WDCA NOAA-ESRL volume_absorption_coefficient_in_air_due_to_dried_aerosol_particles" />
  <attribute name="id" value="4TRV-X9JR.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/4TRV-X9JR" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Kalapov, I., Arsov, T., ACTRIS, GAW-WDCA, NOAA-ESRL, 2021, Aerosol_absorption_coefficient at BEO Moussala, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/4TRV-X9JR" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="BG02L &quot;Name not reported&quot;" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2021-06-06T20:53:13.097000Z" />
  <attribute name="date_metadata_modified" value="2021-06-06T20:53:13Z" />
  <attribute name="creator_name" value="Ivo Emilov Kalapov, Todor Petkov Arsov" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value=", arsoff@inrne.bas.bg" />
  <attribute name="creator_institution" value=", Institut of Nuclear Research and Nuclear Energy" />
  <attribute name="contributor_name" value="Ivo Emilov Kalapov, Todor Petkov Arsov" />
  <attribute name="contributor_role" value="data submitter, data submitter" />
  <attribute name="publisher_type" value="institution" />
  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="MULTIPOINT Z ((23.5856 42.179199 2925), (23.583333 42.166667 2925))" />
  <attribute name="geospatial_lat_min" type="double" value="42.166667" />
  <attribute name="geospatial_lat_max" type="double" value="42.179199" />
  <attribute name="geospatial_lon_min" type="double" value="23.583333" />
  <attribute name="geospatial_lon_max" type="double" value="23.5856" />
  <attribute name="geospatial_vertical_min" type="double" value="2925.0" />
  <attribute name="geospatial_vertical_max" type="double" value="2925.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2012-01-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2020-01-01T00:00:00Z" />
  <attribute name="time_coverage_duration" value="P0008-00-00T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-00T01:00:00" />
  <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="Kalapov, I., Arsov, T., ACTRIS, GAW-WDCA, NOAA-ESRL, 2021, Aerosol_absorption_coefficient at BEO Moussala, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/4TRV-X9JR" />
  <attribute name="ebas_set_type_code" value="TU" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="4TRV-X9JR.nc" />
  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/4TRV-X9JR" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/4TRV-X9JR" />
  <attribute name="ebas_file_creation" value="2026-05-07T23:16:26.983969Z" />
  <attribute name="ebas_export_state" value="2021-06-06T20:53:13.097000Z" />
  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="2012-01-01T00:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2021-06-06T20:53:13.097000Z" />
  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="8y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_orig_time_res" value="1mn" />
  <attribute name="ebas_station_code" value="BG0001R" />
  <attribute name="ebas_platform_code" value="BG0001S" />
  <attribute name="ebas_station_name" value="BEO Moussala" />
  <attribute name="ebas_station_latitude" type="double" value="42.166667" />
  <attribute name="ebas_station_longitude" type="double" value="23.583333" />
  <attribute name="ebas_station_altitude" value="2971.0 m" />
  <attribute name="ebas_measurement_latitude" type="double" value="42.179199" />
  <attribute name="ebas_measurement_longitude" type="double" value="23.5856" />
  <attribute name="ebas_measurement_altitude" value="2925.0 m" />
  <attribute name="ebas_measurement_height" value="10.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_laboratory_code" value="BG02L" />
  <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
  <attribute name="ebas_instrument_name" value="GMD_CLAP-3W_BEO" />
  <attribute name="ebas_instrument_manufacturer" value="NOAA/ESRL/GMD" />
  <attribute name="ebas_instrument_model" value="CLAP-10" />
  <attribute name="ebas_instrument_serial_number" value="22" />
  <attribute name="ebas_method_ref" value="BG02L_abs_coef" />
  <attribute name="ebas_standard_method" value="Single-angle_Correction=Bond1999_Ogren2010" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_volume_std_temperature" value="273.15 K" />
  <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
  <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="BG02L, Name not reported, , , , , , , " />
  <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
  <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Aerosols, " />
  <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, &quot;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, Markus Fiebig, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&quot;" />
  <attribute name="ebas_submitter" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&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, GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
  <attribute name="ebas_comment" value="Standard Bond et al. 1999 values for K1 and K2 used at all wavelengths" />
  <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="70128" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="8" />
  <dimension name="d_Location" length="1" />
  <dimension name="qc_temperature_flags" length="3" />
  <dimension name="d_Wavelength" length="3" />
  <dimension name="qc_aerosol_absorption_coefficient_amean_flags" length="3" />
  <dimension name="qc_aerosol_absorption_coefficient_prec1587_flags" length="3" />
  <dimension name="qc_aerosol_absorption_coefficient_perc8413_flags" length="3" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2012-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2019-12-31T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3600.0" />
    <attribute name="time_coverage_duration" value="P0Y0M2921DT23H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-05-18" />
    <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_temperature" shape="d_Location time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="K" />
    <attribute name="ancillary_variables" value="qc_temperature meta_temperature" />
    <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="2021-06-06T20:53:13.097000Z" />
    <attribute name="ebas_version" value="1" />
    <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="1mn" />
    <attribute name="ebas_station_code" value="BG0001R" />
    <attribute name="ebas_platform_code" value="BG0001S" />
    <attribute name="ebas_station_name" value="BEO Moussala" />
    <attribute name="ebas_station_latitude" type="double" value="42.166667" />
    <attribute name="ebas_station_longitude" type="double" value="23.583333" />
    <attribute name="ebas_station_altitude" value="2971.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="42.179199" />
    <attribute name="ebas_measurement_longitude" type="double" value="23.5856" />
    <attribute name="ebas_measurement_altitude" value="2925.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="temperature" />
    <attribute name="ebas_unit" value="K" />
    <attribute name="ebas_matrix" value="instrument" />
    <attribute name="ebas_laboratory_code" value="BG02L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="GMD_CLAP-3W_BEO" />
    <attribute name="ebas_instrument_manufacturer" value="NOAA/ESRL/GMD" />
    <attribute name="ebas_instrument_model" value="CLAP-10" />
    <attribute name="ebas_instrument_serial_number" value="22" />
    <attribute name="ebas_method_ref" value="BG02L_abs_coef" />
    <attribute name="ebas_standard_method" value="Single-angle_Correction=Bond1999_Ogren2010" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <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="BG02L, Name not reported, , , , , , , " />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Aerosols, " />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, &quot;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, Markus Fiebig, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&quot;" />
    <attribute name="ebas_submitter" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&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, GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Standard Bond et al. 1999 values for K1 and K2 used at all wavelengths" />
  </variable>
  <variable name="qc_temperature" shape="d_Location qc_temperature_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_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="qc_aerosol_absorption_coefficient_amean meta_aerosol_absorption_coefficient_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="2021-06-06T20:53:13.097000Z" />
    <attribute name="ebas_version" value="1" />
    <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="1mn" />
    <attribute name="ebas_station_code" value="BG0001R" />
    <attribute name="ebas_platform_code" value="BG0001S" />
    <attribute name="ebas_station_name" value="BEO Moussala" />
    <attribute name="ebas_station_latitude" type="double" value="42.166667" />
    <attribute name="ebas_station_longitude" type="double" value="23.583333" />
    <attribute name="ebas_station_altitude" value="2971.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="42.179199" />
    <attribute name="ebas_measurement_longitude" type="double" value="23.5856" />
    <attribute name="ebas_measurement_altitude" value="2925.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="aerosol_absorption_coefficient" />
    <attribute name="ebas_unit" value="1/Mm" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="BG02L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="GMD_CLAP-3W_BEO" />
    <attribute name="ebas_instrument_manufacturer" value="NOAA/ESRL/GMD" />
    <attribute name="ebas_instrument_model" value="CLAP-10" />
    <attribute name="ebas_instrument_serial_number" value="22" />
    <attribute name="ebas_method_ref" value="BG02L_abs_coef" />
    <attribute name="ebas_standard_method" value="Single-angle_Correction=Bond1999_Ogren2010" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <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="BG02L, Name not reported, , , , , , , " />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Aerosols, " />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, &quot;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, Markus Fiebig, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&quot;" />
    <attribute name="ebas_submitter" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&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, GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Standard Bond et al. 1999 values for K1 and K2 used at all wavelengths" />
    <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/GAW-WDCA, https://vocabulary.actris.nilu.no/actris_controlled_lists/NOAA-ESRL" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_aerosol_absorption_coefficient_amean" shape="d_Wavelength qc_aerosol_absorption_coefficient_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_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" />
    <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="qc_aerosol_absorption_coefficient_prec1587 meta_aerosol_absorption_coefficient_prec1587" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2021-06-06T20:53:13.097000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_statistics" value="percentile:15.87" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="BG0001R" />
    <attribute name="ebas_platform_code" value="BG0001S" />
    <attribute name="ebas_station_name" value="BEO Moussala" />
    <attribute name="ebas_station_latitude" type="double" value="42.166667" />
    <attribute name="ebas_station_longitude" type="double" value="23.583333" />
    <attribute name="ebas_station_altitude" value="2971.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="42.179199" />
    <attribute name="ebas_measurement_longitude" type="double" value="23.5856" />
    <attribute name="ebas_measurement_altitude" value="2925.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="aerosol_absorption_coefficient" />
    <attribute name="ebas_unit" value="1/Mm" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="BG02L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="GMD_CLAP-3W_BEO" />
    <attribute name="ebas_instrument_manufacturer" value="NOAA/ESRL/GMD" />
    <attribute name="ebas_instrument_model" value="CLAP-10" />
    <attribute name="ebas_instrument_serial_number" value="22" />
    <attribute name="ebas_method_ref" value="BG02L_abs_coef" />
    <attribute name="ebas_standard_method" value="Single-angle_Correction=Bond1999_Ogren2010" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <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="BG02L, Name not reported, , , , , , , " />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Aerosols, " />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, &quot;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, Markus Fiebig, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&quot;" />
    <attribute name="ebas_submitter" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&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, GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Standard Bond et al. 1999 values for K1 and K2 used at all wavelengths" />
    <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/GAW-WDCA, https://vocabulary.actris.nilu.no/actris_controlled_lists/NOAA-ESRL" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_aerosol_absorption_coefficient_prec1587" shape="d_Wavelength qc_aerosol_absorption_coefficient_prec1587_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_prec1587" 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_perc8413" 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="qc_aerosol_absorption_coefficient_perc8413 meta_aerosol_absorption_coefficient_perc8413" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2021-06-06T20:53:13.097000Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_statistics" value="percentile:84.13" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="BG0001R" />
    <attribute name="ebas_platform_code" value="BG0001S" />
    <attribute name="ebas_station_name" value="BEO Moussala" />
    <attribute name="ebas_station_latitude" type="double" value="42.166667" />
    <attribute name="ebas_station_longitude" type="double" value="23.583333" />
    <attribute name="ebas_station_altitude" value="2971.0 m" />
    <attribute name="ebas_measurement_latitude" type="double" value="42.179199" />
    <attribute name="ebas_measurement_longitude" type="double" value="23.5856" />
    <attribute name="ebas_measurement_altitude" value="2925.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="aerosol_absorption_coefficient" />
    <attribute name="ebas_unit" value="1/Mm" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="BG02L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="GMD_CLAP-3W_BEO" />
    <attribute name="ebas_instrument_manufacturer" value="NOAA/ESRL/GMD" />
    <attribute name="ebas_instrument_model" value="CLAP-10" />
    <attribute name="ebas_instrument_serial_number" value="22" />
    <attribute name="ebas_method_ref" value="BG02L_abs_coef" />
    <attribute name="ebas_standard_method" value="Single-angle_Correction=Bond1999_Ogren2010" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <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="BG02L, Name not reported, , , , , , , " />
    <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, World Data Centre for Aerosols, " />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, &quot;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, Markus Fiebig, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&quot;" />
    <attribute name="ebas_submitter" value="&quot;Kalapov, Ivo Emilov, , , , , , , , , &quot;, &quot;Arsov, Todor Petkov, arsoff@inrne.bas.bg, Institut of Nuclear Research and Nuclear Energy, , , Tsarigradsko chaussee Blvd., , 1784, Sofia, Bulgaria&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, GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Standard Bond et al. 1999 values for K1 and K2 used at all wavelengths" />
    <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/GAW-WDCA, https://vocabulary.actris.nilu.no/actris_controlled_lists/NOAA-ESRL" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS, GAW-WDCA, NOAA-ESRL" />
    <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>
