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  <attribute name="title" value="Aerosol light scattering at Kumpula (SMEAR III)" />
  <attribute name="summary" value="Aerosol light scattering at Kumpula (SMEAR III). These measurements are gathered as a part of the following projects ACTRIS, GAW-WDCA 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_light_backscattering_coefficient in aerosol (volume_backwards_scattering_coefficient_in_air_due_to_dried_aerosol_particles)', 'aerosol_light_scattering_coefficient in aerosol (volume_scattering_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/TVNB-M8NK" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Asmi, E., Servomaa, H., ACTRIS, GAW-WDCA, 2026, Aerosol light scattering at Kumpula (SMEAR III), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/TVNB-M8NK" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FI01L &quot;Finnish Meteorological Institute&quot; FMI/IKO &quot;Atmospheric Composition Unit (IKO)&quot; &quot;Erik Palménin aukio&quot; FI-00560 Helsinki Finland" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-02T11:20:45.420131Z" />
  <attribute name="date_metadata_modified" value="2026-05-31T21:27:35Z" />
  <attribute name="creator_name" value="Eija Asmi, Henri Servomaa" />
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  <attribute name="creator_email" value="eija.asmi@fmi.fi, henri.servomaa@fmi.fi" />
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  <attribute name="contributor_name" value="Krista Luoma" />
  <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="timezone" value="UTC" />
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  <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="ebas_citation" value="Asmi, E., Servomaa, H., ACTRIS, GAW-WDCA, 2026, Aerosol light scattering at Kumpula (SMEAR III), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/TVNB-M8NK" />
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  <attribute name="ebas_station_other_ids" value="FIHELS (SYLVA)" />
  <attribute name="ebas_station_land_use" value="Urban park" />
  <attribute name="ebas_station_setting" value="Suburban" />
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  <attribute name="ebas_instrument_manufacturer" value="Ecotech" />
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  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="PM10 at ambient humidity inlet, Digitel, flow 16 l/min" />
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  <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations at very low concentrations" />
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  <attribute name="ebas_framework_acronym" value="ACTRIS, GAW-WDCA" />
  <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" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Asmi, Eija, eija.asmi@fmi.fi, Finnish Meteorological Institute, FMI, , Erik Palmenin aukio 1, , FI-00560, Helsinki, Finland&quot;, &quot;Servomaa, Henri, henri.servomaa@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Composition Research, Erik Palménin aukio 1, , FI-00560, Helsinki, Finland&quot;" />
  <attribute name="ebas_submitter" value="&quot;Luoma, Krista, krista.q.luoma@helsinki.fi, University of Helsinki, UHEL, &quot;&quot;Division of Atmospheric Sciences, Department of Physics&quot;&quot;, PO BOX 64, , FI-00014, University of Helsinki, 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 frameworks: ACTRIS, GAW-WDCA. Request acknowledgment details from data originator" />
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  <attribute name="geospatial_lon_units" value="degrees_east" />
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  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="time" length="3035" />
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  <dimension name="d_Location_d0" length="1" />
  <dimension name="qc_pressure_flags" length="1" />
  <dimension name="d_Location_d1" length="1" />
  <dimension name="qc_relative_humidity_flags" length="1" />
  <dimension name="qc_temperature_flags" length="1" />
  <dimension name="d_Wavelength" length="3" />
  <dimension name="qc_aerosol_light_backscattering_coefficient_0_flags" length="1" />
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    <attribute name="metadata_creation" value="2026-06-26" />
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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" />
    <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_volume_std_pressure" value="instrument internal" />
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    <attribute name="ebas_zero_negative_values" value="Zero and negative values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_matrix" value="instrument" />
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    <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" />
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    <attribute name="ebas_originator" value="&quot;Asmi, Eija, eija.asmi@fmi.fi, Finnish Meteorological Institute, FMI, , Erik Palmenin aukio 1, , FI-00560, Helsinki, Finland&quot;, &quot;Servomaa, Henri, henri.servomaa@fmi.fi, Finnish Meteorological Institute, FMI, Atmospheric Composition Research, Erik Palménin aukio 1, , FI-00560, Helsinki, Finland&quot;" />
    <attribute name="ebas_submitter" value="&quot;Luoma, Krista, krista.q.luoma@helsinki.fi, University of Helsinki, UHEL, &quot;&quot;Division of Atmospheric Sciences, Department of Physics&quot;&quot;, PO BOX 64, , FI-00014, University of Helsinki, 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 frameworks: ACTRIS, GAW-WDCA. Request acknowledgment details from data originator" />
  </variable>
  <variable name="qc_relative_humidity" shape="d_Location_d1 qc_relative_humidity_flags time" type="int">
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlelightscatteringcoefficient" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle light scattering coefficient" />
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    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_aerosol_light_scattering_coefficient" shape="d_Wavelength qc_aerosol_light_scattering_coefficient_flags time" type="int">
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    <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_light_scattering_coefficient" 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>
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    <attribute name="long_name" value="time of ebas metadata intervals" />
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  <variable name="d_Wavelength" shape="d_Wavelength" type="double" />
</netcdf>
