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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Particle_number_size_distribution at Villeneuve d'Ascq" />
  <attribute name="keywords" value="particle_number_size_distribution, Villeneuve d'Ascq, number_concentration_of_positive_ions_in_dry_aerosol_particles_in_air, FR0027U, aerosol, GAW-WDCA" />
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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. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment" />
  <attribute name="doi" value="https://doi.org/10.48597/6YQJ-G6BB|https://doi.org/10.48597/6S7B-V24B" separator="|" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Crumeyrolle, S., GAW-WDCA, 2026, Particle_number_size_distribution at Villeneuve d'Ascq, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/6YQJ-G6BB, https://doi.org/10.48597/6S7B-V24B" />
  <attribute name="summary" value="Particle_number_size_distribution at Villeneuve d'Ascq. 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: particle_number_size_distribution in aerosol (number_concentration_of_positive_ions_in_dry_aerosol_particles_in_air), particle_number_size_distribution in aerosol (number_concentration_of_positive_ions_in_dry_aerosol_particles_in_air), particle_number_size_distribution in aerosol (number_concentration_of_positive_ions_in_dry_aerosol_particles_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FR28L, Université de Lille, LOA Univ. Lille, Laboratoire d'Optique Atmosphérique, Cité Scientifique, 59655, Villeneuve d'Ascq Cedex, France" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-23T13:31:45 UTC" />
  <attribute name="date_metadata_modified" value="2026-06-23T13:31:45 UTC" />
  <attribute name="creator_name" value="Suzanne Crumeyrolle" />
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  <attribute name="creator_institution" value="&quot;Universite de Lille, Laboratoire d'Optique Atmospherique&quot;" />
  <attribute name="contributor_name" value="Nicolas Pascal" />
  <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="geospatial_bounds" value="POINT Z (50.611 3.1403 70.0)" />
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  <attribute name="geospatial_lon_max" type="double" value="3.1403" />
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  <attribute name="time_coverage_start" value="2018-01-01T00:00:00 UTC" />
  <attribute name="time_coverage_end" value="2018-01-10T08:00:00 UTC" />
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  <attribute name="ebas_station_land_use" value="Other" />
  <attribute name="ebas_station_setting" value="Suburban" />
  <attribute name="ebas_station_wmo_region" value="6" />
  <attribute name="ebas_station_latitude" value="50.611017" />
  <attribute name="ebas_station_longitude" value="3.14035" />
  <attribute name="ebas_station_altitude" value="70.0 m" />
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  <attribute name="ebas_inlet_type" value="Stainless steel" />
  <attribute name="ebas_inlet_description" value="Whole air inlet" />
  <attribute name="ebas_humidity_temperaure_control_description" value="sample dried to below 40% RH with nafion dryer operated with reduced pressure sheath 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_expl" value="Typical value of unit-to-unit variability" />
  <attribute name="ebas_zero_negative_values_code" value="Zero possible" />
  <attribute name="ebas_zero_negative_values" value="Zero values may appear due to statistical variations at very low concentrations" />
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  <attribute name="ebas_submitter" value="Pascal, Nicolas, , , , , , , , , " />
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  <attribute name="ebas_comment" value="a dilution factor of *1.5 is applied on concentrations for levels &gt;= 1, CPC used is an 3775" />
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  <attribute name="geospatial_lat_units" value="degrees_north" />
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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;Crumeyrolle, S., GAW-WDCA, 2026, Particle_number_size_distribution at Villeneuve d'Ascq, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/6YQJ-G6BB, https://doi.org/10.48597/6S7B-V24B&quot;, &#xA;    &quot;Set type code&quot;: &quot;TU&quot;, &#xA;    &quot;Timezone&quot;: &quot;UTC&quot;, &#xA;    &quot;File name&quot;: &quot;FR0027U.20180101000000.20260623133145.smps...9d.1h.FR28L_TSI_3082_VDA..lev2.nc&quot;, &#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/6YQJ-G6BB, https://doi.org/10.48597/6S7B-V24B&quot;, &#xA;    &quot;File creation&quot;: &quot;2026-06-23T16:16:37.403055 UTC&quot;, &#xA;    &quot;Export state&quot;: &quot;2026-06-23T15:25:03.431989 UTC&quot;, &#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;, &#xA;    &quot;Startdate&quot;: &quot;20180101000000&quot;, &#xA;    &quot;Revision date&quot;: &quot;20260623133145&quot;, &#xA;    &quot;Version&quot;: &quot;1&quot;, &#xA;    &quot;Version description&quot;: &quot;Initial version&quot;, &#xA;    &quot;Data level&quot;: &quot;2&quot;, &#xA;    &quot;Period code&quot;: &quot;9d&quot;, &#xA;    &quot;Resolution code&quot;: &quot;1h&quot;, &#xA;    &quot;Sample duration&quot;: &quot;1h&quot;, &#xA;    &quot;Orig. time res.&quot;: &quot;5mn&quot;, &#xA;    &quot;Station code&quot;: &quot;FR0027U&quot;, &#xA;    &quot;Platform code&quot;: &quot;FR0027S&quot;, &#xA;    &quot;Station name&quot;: &quot;Villeneuve d'Ascq&quot;, &#xA;    &quot;Station GAW-ID&quot;: &quot;VDA&quot;, &#xA;    &quot;Station land use&quot;: &quot;Other&quot;, &#xA;    &quot;Station setting&quot;: &quot;Suburban&quot;, &#xA;    &quot;Station WMO region&quot;: &quot;6&quot;, &#xA;    &quot;Station latitude&quot;: &quot;50.611017&quot;, &#xA;    &quot;Station longitude&quot;: &quot;3.14035&quot;, &#xA;    &quot;Station altitude&quot;: &quot;70.0 m&quot;, &#xA;    &quot;Measurement latitude&quot;: &quot;50.611&quot;, &#xA;    &quot;Measurement longitude&quot;: &quot;3.1403&quot;, &#xA;    &quot;Measurement altitude&quot;: &quot;70.0 m&quot;, &#xA;    &quot;Measurement height&quot;: &quot;20.0 m&quot;, &#xA;    &quot;Regime&quot;: &quot;IMG&quot;, &#xA;    &quot;Laboratory code&quot;: &quot;FR28L&quot;, &#xA;    &quot;Instrument type&quot;: &quot;smps&quot;, &#xA;    &quot;Instrument name&quot;: &quot;TSI_3082_VDA&quot;, &#xA;    &quot;Instrument manufacturer&quot;: &quot;TSI&quot;, &#xA;    &quot;Instrument model&quot;: &quot;3082&quot;, &#xA;    &quot;Instrument serial number&quot;: &quot;3082001718003&quot;, &#xA;    &quot;Standard method&quot;: &quot;SOP=Wiedensohler2012&quot;, &#xA;    &quot;Inlet type&quot;: &quot;Stainless steel&quot;, &#xA;    &quot;Inlet description&quot;: &quot;Whole air inlet&quot;, &#xA;    &quot;Humidity/temperature control description&quot;: &quot;sample dried to below 40% RH with nafion dryer operated with reduced pressure sheath air&quot;, &#xA;    &quot;Volume std. temperature&quot;: &quot;273.15 K&quot;, &#xA;    &quot;Volume std. pressure&quot;: &quot;1013.25 hPa&quot;, &#xA;    &quot;Measurement uncertainty expl.&quot;: &quot;Typical value of unit-to-unit variability&quot;, &#xA;    &quot;Zero/negative values code&quot;: &quot;Zero possible&quot;, &#xA;    &quot;Zero/negative values&quot;: &quot;Zero values may appear due to statistical variations at very low concentrations&quot;, &#xA;    &quot;Organization&quot;: &quot;FR28L, Université de Lille, LOA Univ. Lille, Laboratoire d'Optique Atmosphérique, Cité Scientifique, , 59655, Villeneuve d'Ascq Cedex, France&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;Crumeyrolle, Suzanne, suzanne.crumeyrolle@univ-lille.fr, Universite de Lille, , Laboratoire d'Optique Atmospherique, UFR de physique - P5 bis - P358, cité Scientifique, 59650, Villeneuve-d'Ascq, France&quot;, &#xA;    &quot;Submitter&quot;: &quot;Pascal, Nicolas, , , , , , , , , &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. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment&quot;, &#xA;    &quot;Comment&quot;: &quot;a dilution factor of *1.5 is applied on concentrations for levels &gt;= 1, CPC used is an 3775&quot;&#xA;}" />
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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: GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment" />
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    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_name" value="Villeneuve d'Ascq" />
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    <attribute name="ebas_measurement_height" value="20.0 m" />
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="units" value="hPa" />
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    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_comment" value="a dilution factor of *1.5 is applied on concentrations for levels &gt;= 1, CPC used is an 3775" />
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    <attribute name="ebas_originator" value="Crumeyrolle, Suzanne, suzanne.crumeyrolle@univ-lille.fr, Universite de Lille, , Laboratoire d'Optique Atmospherique, UFR de physique - P5 bis - P358, cité Scientifique, 59650, Villeneuve-d'Ascq, France" />
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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: GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment" />
    <attribute name="ebas_instrument_serial_number" value="3082001718003" />
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    <attribute name="ebas_station_setting" value="Suburban" />
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    <attribute name="ebas_measurement_height" value="20.0 m" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="number_concentration_of_positive_ions_in_dry_aerosol_particles_in_air" />
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    <attribute name="ebas_comment" value="a dilution factor of *1.5 is applied on concentrations for levels &gt;= 1, CPC used is an 3775" />
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    <attribute name="ebas_originator" value="Crumeyrolle, Suzanne, suzanne.crumeyrolle@univ-lille.fr, Universite de Lille, , Laboratoire d'Optique Atmospherique, UFR de physique - P5 bis - P358, cité Scientifique, 59650, Villeneuve-d'Ascq, France" />
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    <attribute name="ebas_station_longitude" value="3.14035" />
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    <attribute name="long_name" value="time of measurement" />
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    <attribute name="units" value="days since 1900-01-01 00:00:00 UTC" />
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    <attribute name="_CoordinateAxisType" value="Time" />
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    <attribute name="calendar" value="gregorian" />
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</netcdf>
