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  <attribute name="title" value="Ground based in situ observations of nephelometer at Alert (CA0420G)" />
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  <attribute name="citation" value="Sangeeta Sharma, aerosol_light_backscattering_coefficient - nephelometer at Alert, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/ZTAE-EKC4" />
  <attribute name="summary" value="Ground based in situ observations of nephelometer at Alert (CA0420G). These measurements are gathered as a part of the following projects GAW-WDCA, NOAA-ESRL and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: aerosol_light_backscattering_coefficient in pm1" />
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    <attribute name="ebas_instrument_serial_number" value="71050223" />
    <attribute name="ebas_method_ref" value="CA01L_scat_coef" />
    <attribute name="ebas_standard_method" value="cal-gas=CO2+AIR_truncation-correction=Anderson1998" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Switched impactor at 1 um" />
    <attribute name="ebas_humidity_temperaure_control" value="Heating to 40% RH, limit 40 deg. C" />
    <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="CA01L, Environment Canada, EC/AES, Atmospheric Environmental Service, 4905 Dufferin Street, , M3H 5T4, &quot;Downsview, Ontario&quot;, Canada" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA, NOAA-ESRL" />
    <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, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Sharma, Sangeeta, sangeeta.sharma@ec.gc.ca, &quot;Climate Chemistry Measurements Research, Environment Canada&quot;, EC, , 4905 Dufferin Street, , M3H 5T4, &quot;Downsview, Ontario&quot;, Canada" />
    <attribute name="ebas_submitter" value="Sharma, Sangeeta, sangeeta.sharma@ec.gc.ca, &quot;Climate Chemistry Measurements Research, Environment Canada&quot;, EC, , 4905 Dufferin Street, , M3H 5T4, &quot;Downsview, Ontario&quot;, Canada" />
    <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
  </variable>
  <variable name="relative_humidity_qc" shape="relative_humidity_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="relative_humidity_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="temperature" shape="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="temperature_qc temperature_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="20150902133756" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
    <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="CA0420G" />
    <attribute name="ebas_platform_code" value="CA0420S" />
    <attribute name="ebas_station_name" value="Alert" />
    <attribute name="ebas_station_wdca_id" value="GAWACANUALT" />
    <attribute name="ebas_station_gaw_id" value="ALT" />
    <attribute name="ebas_station_gaw_name" value="Alert" />
    <attribute name="ebas_station_state_province" value="NU" />
    <attribute name="ebas_station_land_use" value="Military reservation" />
    <attribute name="ebas_station_setting" value="Polar" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" value="4" />
    <attribute name="ebas_station_latitude" value="82.4991455078" />
    <attribute name="ebas_station_longitude" value="-62.3415260315" />
    <attribute name="ebas_station_altitude" value="210.0 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="CA01L" />
    <attribute name="ebas_instrument_type" value="nephelometer" />
    <attribute name="ebas_instrument_name" value="TSI_3563_ALT_pm1" />
    <attribute name="ebas_instrument_manufacturer" value="TSI" />
    <attribute name="ebas_instrument_model" value="3563" />
    <attribute name="ebas_instrument_serial_number" value="71050223" />
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    <attribute name="ebas_standard_method" value="cal-gas=CO2+AIR_truncation-correction=Anderson1998" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Switched impactor at 1 um" />
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    <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" />
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    <attribute name="ebas_framework_acronym" value="GAW-WDCA, NOAA-ESRL" />
    <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, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
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    <attribute name="ebas_submitter" value="Sharma, Sangeeta, sangeeta.sharma@ec.gc.ca, &quot;Climate Chemistry Measurements Research, Environment Canada&quot;, EC, , 4905 Dufferin Street, , M3H 5T4, &quot;Downsview, Ontario&quot;, Canada" />
    <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
  </variable>
  <variable name="temperature_qc" shape="temperature_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="temperature_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="1/Mm" />
    <attribute name="ancillary_variables" value="aerosol_light_backscattering_coefficient_0_qc aerosol_light_backscattering_coefficient_0_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
    <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="CA0420G" />
    <attribute name="ebas_platform_code" value="CA0420S" />
    <attribute name="ebas_station_name" value="Alert" />
    <attribute name="ebas_station_wdca_id" value="GAWACANUALT" />
    <attribute name="ebas_station_gaw_id" value="ALT" />
    <attribute name="ebas_station_gaw_name" value="Alert" />
    <attribute name="ebas_station_state_province" value="NU" />
    <attribute name="ebas_station_land_use" value="Military reservation" />
    <attribute name="ebas_station_setting" value="Polar" />
    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" value="4" />
    <attribute name="ebas_station_latitude" value="82.4991455078" />
    <attribute name="ebas_station_longitude" value="-62.3415260315" />
    <attribute name="ebas_station_altitude" value="210.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="aerosol_light_backscattering_coefficient" />
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    <attribute name="ebas_matrix" value="pm1" />
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    <attribute name="ebas_instrument_type" value="nephelometer" />
    <attribute name="ebas_instrument_name" value="TSI_3563_ALT_pm1" />
    <attribute name="ebas_instrument_manufacturer" value="TSI" />
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    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Switched impactor at 1 um" />
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    <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="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., " />
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    <attribute name="ebas_submitter" value="Sharma, Sangeeta, sangeeta.sharma@ec.gc.ca, &quot;Climate Chemistry Measurements Research, Environment Canada&quot;, EC, , 4905 Dufferin Street, , M3H 5T4, &quot;Downsview, Ontario&quot;, Canada" />
    <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
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  <variable name="aerosol_light_backscattering_coefficient_0_qc" shape="aerosol_light_backscattering_coefficient_0_qc_flags time" type="int">
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    <attribute name="units" value="1" />
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  <variable name="aerosol_light_backscattering_coefficient_0_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="aerosol_light_backscattering_coefficient_1" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CA0420G" />
    <attribute name="ebas_platform_code" value="CA0420S" />
    <attribute name="ebas_station_name" value="Alert" />
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    <attribute name="ebas_station_gaw_id" value="ALT" />
    <attribute name="ebas_station_gaw_name" value="Alert" />
    <attribute name="ebas_station_state_province" value="NU" />
    <attribute name="ebas_station_land_use" value="Military reservation" />
    <attribute name="ebas_station_setting" value="Polar" />
    <attribute name="ebas_station_gaw_type" value="G" />
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    <attribute name="ebas_station_latitude" value="82.4991455078" />
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    <attribute name="ebas_station_altitude" value="210.0 m" />
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    <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
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  <variable name="aerosol_light_backscattering_coefficient_1_qc" shape="aerosol_light_backscattering_coefficient_1_qc_flags time" type="int">
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  <variable name="aerosol_light_backscattering_coefficient_1_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="aerosol_light_backscattering_coefficient_2" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_station_name" value="Alert" />
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    <attribute name="ebas_station_gaw_id" value="ALT" />
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    <attribute name="ebas_station_state_province" value="NU" />
    <attribute name="ebas_station_land_use" value="Military reservation" />
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    <attribute name="ebas_component" value="aerosol_light_backscattering_coefficient" />
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  <variable name="aerosol_light_backscattering_coefficient_2_qc" shape="aerosol_light_backscattering_coefficient_2_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_light_backscattering_coefficient_2_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="time" shape="time" type="double">
    <attribute name="long_name" value="time of measurement" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01 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>
</netcdf>
