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  <attribute name="title" value="Aerosol_optical_depth at Troll" />
  <attribute name="keywords" value="aerosol, aerosol_optical_depth, GAW-WDCA, NO0058G, atmosphere_optical_thickness_due_to_ambient_aerosol_particles, Troll" />
  <attribute name="id" value="PNKR-JPSD.nc" />
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  <attribute name="project" value="GAW-WDCA" />
  <attribute name="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. Request acknowledgement details from WORCC-PMOD/WRC (worcc@pmodwrc.ch)" />
  <attribute name="doi" value="https://doi.org/10.48597/PNKR-JPSD" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Stebel, K., GAW-WDCA, 2017, Aerosol_optical_depth at Troll, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/PNKR-JPSD" />
  <attribute name="summary" value="Aerosol_optical_depth at Troll. 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: aerosol_optical_depth in aerosol (atmosphere_optical_thickness_due_to_ambient_aerosol_particles), aerosol_optical_depth in aerosol (atmosphere_optical_thickness_due_to_ambient_aerosol_particles), aerosol_optical_depth in aerosol (atmosphere_optical_thickness_due_to_ambient_aerosol_particles)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="NO01L, Norwegian Institute for Air Research, NILU, Instituttveien 18, 2007, Kjeller, Norway" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2017-12-06T14:26:29 UTC" />
  <attribute name="date_metadata_modified" value="2017-12-06T14:26:29 UTC" />
  <attribute name="creator_name" value="Kerstin Stebel" />
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  <attribute name="creator_institution" value="&quot;Norwegian Institute for Air Research, ATMOS, NILU&quot;" />
  <attribute name="contributor_name" value="Stelios Kazadzis, Natalia Kouremeti" />
  <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" />
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  <attribute name="ebas_period_code" value="23mo" />
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  <attribute name="ebas_matrix" value="aerosol" />
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  <attribute name="ebas_standard_method" value="Sunphotometry_PFR_manual_2009" />
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  <attribute name="ebas_volume_std_pressure" value="ambient" />
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  <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
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  <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
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  <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
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  <attribute name="ebas_originator" value="Stebel, Kerstin, Kerstin.Stebel@nilu.no, Norwegian Institute for Air Research, NILU, ATMOS, P.O.Box 100, , 2027, Kjeller, Norway" />
  <attribute name="ebas_submitter" value="Kouremeti, Natalia, natalia.kouremeti@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland" />
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  <attribute name="ebas_comment" value="Preliminary Calibration" />
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  <attribute name="comment" value="{&#xA;    &quot;Data definition&quot;: &quot;EBAS_1.1&quot;,&#xA;    &quot;Data license&quot;: &quot;https://creativecommons.org/licenses/by/4.0/&quot;,&#xA;    &quot;Citation&quot;: &quot;Stebel, K., GAW-WDCA, 2017, Aerosol_optical_depth at Troll, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/PNKR-JPSD&quot;,&#xA;    &quot;Set type code&quot;: &quot;TI&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;PNKR-JPSD.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/PNKR-JPSD&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/PNKR-JPSD&quot;,&#xA;    &quot;File creation&quot;: &quot;2024-05-02T12:47:44.086038 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2017-12-12T08:44:31.867000 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20140101203000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20171206142629&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;quality assured, post-calibrated, manually inspected&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;23mo&quot;,&#xA;    &quot;Resolution code&quot;: &quot;1h&quot;,&#xA;    &quot;Sample duration&quot;: &quot;1h&quot;,&#xA;    &quot;Orig. time res.&quot;: &quot;1mn&quot;,&#xA;    &quot;Station code&quot;: &quot;NO0058G&quot;,&#xA;    &quot;Platform code&quot;: &quot;NO0058S&quot;,&#xA;    &quot;Station name&quot;: &quot;Troll&quot;,&#xA;    &quot;Station land use&quot;: &quot;Snowfield&quot;,&#xA;    &quot;Station setting&quot;: &quot;Polar&quot;,&#xA;    &quot;Station latitude&quot;: &quot;-72.016667&quot;,&#xA;    &quot;Station longitude&quot;: &quot;2.533333&quot;,&#xA;    &quot;Station altitude&quot;: &quot;1309.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;1.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Unit&quot;: &quot;no unit&quot;,&#xA;    &quot;Matrix&quot;: &quot;aerosol&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;NO01L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;sun_tracking_filter_radiometer&quot;,&#xA;    &quot;Instrument name&quot;: &quot;PMOD-WRC_PFR-N_TRO&quot;,&#xA;    &quot;Instrument serial number&quot;: &quot;42&quot;,&#xA;    &quot;Method ref&quot;: &quot;CH04L_optical_transmission&quot;,&#xA;    &quot;Standard method&quot;: &quot;Sunphotometry_PFR_manual_2009&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;None&quot;,&#xA;    &quot;Humidity/temperature control description&quot;: &quot;in situ measurement, ambient conditions&quot;,&#xA;    &quot;Volume std. temperature&quot;: &quot;ambient&quot;,&#xA;    &quot;Volume std. pressure&quot;: &quot;ambient&quot;,&#xA;    &quot;Detection limit&quot;: &quot;0.001 no unit&quot;,&#xA;    &quot;Detection limit expl.&quot;: &quot;0.001 optical depths&quot;,&#xA;    &quot;Zero/negative values&quot;: &quot;physically impossible&quot;,&#xA;    &quot;Organization&quot;: &quot;NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;GAW-WDCA&quot;,&#xA;    &quot;Framework name&quot;: &quot;World Data Centre for Aerosols&quot;,&#xA;    &quot;Framework description&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;,&#xA;    &quot;Framework contact name&quot;: &quot;Markus Fiebig&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;Markus.Fiebig@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Stebel, Kerstin, Kerstin.Stebel@nilu.no, Norwegian Institute for Air Research, NILU, ATMOS, P.O.Box 100, , 2027, Kjeller, Norway&quot;,&#xA;    &quot;Submitter&quot;: &quot;Kouremeti, Natalia, natalia.kouremeti@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland&quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;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. Request acknowledgement details from WORCC-PMOD/WRC (worcc@pmodwrc.ch)&quot;,&#xA;    &quot;Comment&quot;: &quot;Preliminary Calibration&quot;&#xA;}" />
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    <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="Stebel, Kerstin, Kerstin.Stebel@nilu.no, Norwegian Institute for Air Research, NILU, ATMOS, P.O.Box 100, , 2027, Kjeller, Norway" />
    <attribute name="ebas_submitter" value="Kouremeti, Natalia, natalia.kouremeti@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland" />
    <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. Request acknowledgement details from WORCC-PMOD/WRC (worcc@pmodwrc.ch)" />
    <attribute name="ebas_comment" value="Preliminary Calibration" />
  </variable>
  <variable name="aerosol_optical_depth_amean_qc" shape="Wavelength aerosol_optical_depth_amean_qc_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="aerosol_optical_depth_amean_ebasmetadata" shape="Wavelength metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="aerosol_optical_depth_median" shape="Wavelength 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="aerosol_optical_depth_median_qc aerosol_optical_depth_median_ebasmetadata" />
    <attribute name="cell_methods" value="time: median" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20171206142629" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="quality assured, post-calibrated, manually inspected" />
    <attribute name="ebas_statistics" value="median" />
    <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="NO0058G" />
    <attribute name="ebas_platform_code" value="NO0058S" />
    <attribute name="ebas_station_name" value="Troll" />
    <attribute name="ebas_station_land_use" value="Snowfield" />
    <attribute name="ebas_station_setting" value="Polar" />
    <attribute name="ebas_station_latitude" value="-72.016667" />
    <attribute name="ebas_station_longitude" value="2.533333" />
    <attribute name="ebas_station_altitude" value="1309.0 m" />
    <attribute name="ebas_measurement_height" value="1.0 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="NO01L" />
    <attribute name="ebas_instrument_type" value="sun_tracking_filter_radiometer" />
    <attribute name="ebas_instrument_name" value="PMOD-WRC_PFR-N_TRO" />
    <attribute name="ebas_instrument_serial_number" value="42" />
    <attribute name="ebas_method_ref" value="CH04L_optical_transmission" />
    <attribute name="ebas_standard_method" value="Sunphotometry_PFR_manual_2009" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="in situ measurement, ambient conditions" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.001 no unit" />
    <attribute name="ebas_detection_limit_expl" value="0.001 optical depths" />
    <attribute name="ebas_zero_negative_values" value="physically impossible" />
    <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
    <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="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." />
    <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="Stebel, Kerstin, Kerstin.Stebel@nilu.no, Norwegian Institute for Air Research, NILU, ATMOS, P.O.Box 100, , 2027, Kjeller, Norway" />
    <attribute name="ebas_submitter" value="Kouremeti, Natalia, natalia.kouremeti@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland" />
    <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. Request acknowledgement details from WORCC-PMOD/WRC (worcc@pmodwrc.ch)" />
    <attribute name="ebas_comment" value="Preliminary Calibration" />
  </variable>
  <variable name="aerosol_optical_depth_median_qc" shape="Wavelength aerosol_optical_depth_median_qc_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="aerosol_optical_depth_median_ebasmetadata" shape="Wavelength metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="aerosol_optical_depth_stddev" shape="Wavelength 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="aerosol_optical_depth_stddev_qc aerosol_optical_depth_stddev_ebasmetadata" />
    <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="20171206142629" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="quality assured, post-calibrated, manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <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="NO0058G" />
    <attribute name="ebas_platform_code" value="NO0058S" />
    <attribute name="ebas_station_name" value="Troll" />
    <attribute name="ebas_station_land_use" value="Snowfield" />
    <attribute name="ebas_station_setting" value="Polar" />
    <attribute name="ebas_station_latitude" value="-72.016667" />
    <attribute name="ebas_station_longitude" value="2.533333" />
    <attribute name="ebas_station_altitude" value="1309.0 m" />
    <attribute name="ebas_measurement_height" value="1.0 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="NO01L" />
    <attribute name="ebas_instrument_type" value="sun_tracking_filter_radiometer" />
    <attribute name="ebas_instrument_name" value="PMOD-WRC_PFR-N_TRO" />
    <attribute name="ebas_instrument_serial_number" value="42" />
    <attribute name="ebas_method_ref" value="CH04L_optical_transmission" />
    <attribute name="ebas_standard_method" value="Sunphotometry_PFR_manual_2009" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_humidity_temperaure_control_description" value="in situ measurement, ambient conditions" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_detection_limit" value="0.001 no unit" />
    <attribute name="ebas_detection_limit_expl" value="0.001 optical depths" />
    <attribute name="ebas_zero_negative_values" value="physically impossible" />
    <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
    <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="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." />
    <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="Stebel, Kerstin, Kerstin.Stebel@nilu.no, Norwegian Institute for Air Research, NILU, ATMOS, P.O.Box 100, , 2027, Kjeller, Norway" />
    <attribute name="ebas_submitter" value="Kouremeti, Natalia, natalia.kouremeti@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland" />
    <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. Request acknowledgement details from WORCC-PMOD/WRC (worcc@pmodwrc.ch)" />
    <attribute name="ebas_comment" value="Preliminary Calibration" />
  </variable>
  <variable name="aerosol_optical_depth_stddev_qc" shape="Wavelength aerosol_optical_depth_stddev_qc_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="aerosol_optical_depth_stddev_ebasmetadata" shape="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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="Wavelength" shape="Wavelength" type="double" />
</netcdf>
