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  <attribute name="title" value="Aerosol_absorption_coefficient at Puijo Smear IV" />
  <attribute name="summary" value="Aerosol_absorption_coefficient at Puijo Smear IV. These measurements are gathered as a part of the following projects ACTRIS and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['pressure in instrument', 'relative_humidity in instrument (relative_humidity)', '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/EN2R-HBH8" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Virtanen, A., Komppula, M., ACTRIS, 2026, Aerosol_absorption_coefficient at Puijo Smear IV, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/EN2R-HBH8" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FI07L &quot;University of Eastern Finland&quot; UEF &quot;Department of Technical Physics, Aerosol Physics research group&quot; &quot;Yliopistonranta 8&quot;  70211 Kuopio Finland" />
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  <attribute name="date_created" value="2026-05-04T07:48:16.451536Z" />
  <attribute name="date_metadata_modified" value="2026-05-04T07:06:58Z" />
  <attribute name="creator_name" value="Annele Virtanen, Mika Komppula" />
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  <attribute name="creator_email" value="annele.virtanen@uef.fi, mika.komppula@fmi.fi" />
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  <attribute name="contributor_name" value="Arttu Ylisirniö, Ari Leskinen, Pasi Miettinen" />
  <attribute name="contributor_role" value="data submitter, 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="time_coverage_start" value="2024-02-05T21:59:59Z" />
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  <attribute name="ebas_station_setting" value="Suburban" />
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  <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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  <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;" />
  <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;" />
  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Virtanen, Annele, annele.virtanen@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Komppula, Mika, mika.komppula@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Research Centre of Eastern Finland, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;" />
  <attribute name="ebas_submitter" value="&quot;Ylisirniö, Arttu, arttu.ylisirni@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Leskinen, Ari, mika.komppula@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Research Centre of Eastern Finland, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Miettinen, Pasi, pasi.miettinen@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&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: ACTRIS. Request acknowledgement details from data originator" />
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  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="time" length="16658" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="2" />
  <dimension name="d_Location" length="1" />
  <dimension name="qc_pressure_flags" length="1" />
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  <dimension name="qc_temperature_flags" length="1" />
  <dimension name="d_Wavelength" length="7" />
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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_framework_contact_name" value="Cathrine Lund Myhre" />
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    <attribute name="ebas_originator" value="&quot;Virtanen, Annele, annele.virtanen@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Komppula, Mika, mika.komppula@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Research Centre of Eastern Finland, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;" />
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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 framework: ACTRIS. Request acknowledgement details from data originator" />
  </variable>
  <variable name="qc_relative_humidity" shape="d_Location qc_relative_humidity_flags time" type="int">
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    <attribute name="ebas_humidity_temperaure_control" value="Nafion dryer" />
    <attribute name="ebas_humidity_temperaure_control_description" value="sample dried to below 40% RH with nafion dryer operated with vacuum using filtered room air" />
    <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" value="6.0 %" />
    <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="FI07L, University of Eastern Finland, UEF, &quot;Department of Technical Physics, Aerosol Physics research group&quot;, Yliopistonranta 8, , 70211, Kuopio, Finland" />
    <attribute name="ebas_framework_acronym" value="ACTRIS" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;" />
    <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;" />
    <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Virtanen, Annele, annele.virtanen@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Komppula, Mika, mika.komppula@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Research Centre of Eastern Finland, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;" />
    <attribute name="ebas_submitter" value="&quot;Ylisirniö, Arttu, arttu.ylisirni@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Leskinen, Ari, mika.komppula@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Research Centre of Eastern Finland, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&quot;, &quot;Miettinen, Pasi, pasi.miettinen@uef.fi, University of Eastern Finland, UEF, Department of Technical Physics, Melania building, Yliopistonranta 8, 70211, Kuopio, Finland&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: ACTRIS. Request acknowledgement details from data originator" />
    <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" />
    <attribute name="actris_framework_preferred_term" value="ACTRIS" />
    <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>
