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  <attribute name="title" value="Aerosol_optical_depth at Mauna Loa" />
  <attribute name="summary" value="Aerosol_optical_depth at Mauna Loa. These measurements are gathered as a part of the following projects GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['sample_count in aerosol', 'aerosol_optical_depth in aerosol (atmosphere_optical_thickness_due_to_ambient_aerosol_particles)']" />
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  <attribute name="project" value="GAW-WDCA" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/H759-55X3" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Wehrli, C., GAW-WDCA, 2010, Aerosol_optical_depth at Mauna Loa, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/H759-55X3" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="CH04L &quot;Physikalisch-Meteorologisches Observatorium Davos&quot; PMOD/WRC WORCC &quot;Dorfstrasse 33&quot; 7260 &quot;Davos Dorf&quot; Switzerland" />
  <attribute name="date_created" value="2014-05-01T00:00:00.000000Z" />
  <attribute name="date_metadata_modified" value="2010-01-25T00:00:00Z" />
  <attribute name="creator_name" value="Christoph Wehrli" />
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  <attribute name="contributor_name" value="Christoph Wehrli" />
  <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" />
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  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_unit" value="no unit" />
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  <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
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  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="d_Wavelength_d0" length="4" />
  <dimension name="qc_sample_count_flags" length="1" />
  <dimension name="qc_aerosol_optical_depth_amean_flags" length="1" />
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    <attribute name="time_coverage_start" value="2005-01-03T22:30:00Z" />
    <attribute name="time_coverage_end" value="2005-12-31T03:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
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    <attribute name="time_coverage_duration" value="P0Y0M361DT5H0M0.000S" />
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  <group name="NCISOMetadata">
    <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="_FillValue" type="double" value="NaN" />
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    <attribute name="units" value="no unit" />
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    <attribute name="ebas_component" value="sample_count" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  </variable>
  <variable name="v_aerosol_optical_depth_stddev" shape="d_Wavelength_d1 time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="atmosphere_optical_thickness_due_to_ambient_aerosol_particles" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="qc_aerosol_optical_depth_stddev meta_aerosol_optical_depth_stddev" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2010-01-25T00:00:00.000000Z" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_station_code" value="US1200R" />
    <attribute name="ebas_platform_code" value="US1200S" />
    <attribute name="ebas_station_name" value="Mauna Loa" />
    <attribute name="ebas_station_wdca_id" value="GAWAUSHIMLO" />
    <attribute name="ebas_station_gaw_id" value="MLO" />
    <attribute name="ebas_station_gaw_name" value="Mauna Loa (HI)" />
    <attribute name="ebas_station_land_use" value="Gravel and stone" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="5" />
    <attribute name="ebas_station_latitude" type="double" value="19.5362300873" />
    <attribute name="ebas_station_longitude" type="double" value="-155.5761566162" />
    <attribute name="ebas_station_altitude" value="3397.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="aerosol_optical_depth" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CH04L" />
    <attribute name="ebas_instrument_type" value="sun_tracking_filter_radiometer" />
    <attribute name="ebas_instrument_name" value="PFR_01" />
    <attribute name="ebas_method_ref" value="CH04L_Optical_Transmission" />
    <attribute name="ebas_organization" value="CH04L, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="&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="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Wehrli, Christoph, c.wehrli@pmodwrc.ch, , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Wehrli, Christoph, c.wehrli@pmodwrc.ch, , , , , , , , &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 framework: GAW-WDCA." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticleopticaldepth" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle optical depth" />
    <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/sunphotometer" />
    <attribute name="actris_instrument_type_preferred_term" value="sun photometer" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_aerosol_optical_depth_stddev" shape="d_Wavelength_d1 qc_aerosol_optical_depth_stddev_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_optical_depth_stddev" shape="d_Wavelength_d1 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_Wavelength_d0" shape="d_Wavelength_d0" type="double" />
  <variable name="d_Wavelength_d1" shape="d_Wavelength_d1" type="double" />
</netcdf>
