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  <attribute name="title" value="Particle_number_concentration at Jungfraujoch" />
  <attribute name="summary" value="Particle_number_concentration at Jungfraujoch. These measurements are gathered as a part of the following projects ACTRIS, CREATE, EMEP, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['pressure in instrument', 'temperature in instrument', 'particle_number_concentration in aerosol (number_concentration_of_particles_in_dry_aerosol_particles_in_air)']" />
  <attribute name="keywords" value="Jungfraujoch CH0001G particle_number_concentration aerosol ACTRIS CREATE EMEP GAW-WDCA number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
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  <attribute name="project" value="ACTRIS, CREATE, EMEP, GAW-WDCA" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/5VGV-BVKY" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Bukowiecki, N., Baltensperger, U., Brem, B., Gysel, M., Gysel-Beer, M., ACTRIS, CREATE, EMEP, GAW-WDCA, 2026, Particle_number_concentration at Jungfraujoch, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/5VGV-BVKY" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="CH02L &quot;Paul Scherrer Institut&quot; PSI &quot;Laboratory of Atmospheric Chemistry (LAC)&quot; OFLB 5232 &quot;Villigen PSI&quot; Switzerland" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-05-29T09:15:24.803673Z" />
  <attribute name="date_metadata_modified" value="2026-05-29T09:15:24Z" />
  <attribute name="creator_name" value="Nicolas Bukowiecki, Urs Baltensperger, Benjamin Brem, Martin Gysel, Martin Gysel-Beer" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value=", , benjamin.brem@psi.ch, , martin.gysel@psi.ch" />
  <attribute name="creator_institution" value=", , &quot;Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, PSI&quot;, , &quot;Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, PSI&quot;" />
  <attribute name="contributor_name" value="Nicolas Bukowiecki, Benjamin Brem" />
  <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" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (7.985 46.5475 3578)" />
  <attribute name="geospatial_lat_min" type="double" value="46.5475" />
  <attribute name="geospatial_lat_max" type="double" value="46.5475" />
  <attribute name="geospatial_lon_min" type="double" value="7.985" />
  <attribute name="geospatial_lon_max" type="double" value="7.985" />
  <attribute name="geospatial_vertical_min" type="double" value="3578.0" />
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  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2015-01-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2026-01-01T00:00:00Z" />
  <attribute name="time_coverage_duration" value="P0011-00-00T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-00T01:00:00" />
  <attribute name="timezone" value="UTC" />
  <attribute name="ebas_data_definition" value="EBAS_1.1" />
  <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="ebas_citation" value="Bukowiecki, N., Baltensperger, U., Brem, B., Gysel, M., Gysel-Beer, M., ACTRIS, CREATE, EMEP, GAW-WDCA, 2026, Particle_number_concentration at Jungfraujoch, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/5VGV-BVKY" />
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  <attribute name="ebas_file_creation" value="2026-06-13T23:26:25.470054Z" />
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  <attribute name="ebas_startdate" value="2015-01-01T00:00:00.000000Z" />
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  <attribute name="ebas_period_code" value="11y" />
  <attribute name="ebas_resolution_code" value="1h" />
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  <attribute name="ebas_station_name" value="Jungfraujoch" />
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  <attribute name="ebas_station_gaw_id" value="JFJ" />
  <attribute name="ebas_station_gaw_name" value="Jungfraujoch" />
  <attribute name="ebas_station_land_use" value="Gravel and stone" />
  <attribute name="ebas_station_setting" value="Mountain" />
  <attribute name="ebas_station_gaw_type" value="G" />
  <attribute name="ebas_station_wmo_region" type="long" value="6" />
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  <attribute name="ebas_station_longitude" type="double" value="7.985" />
  <attribute name="ebas_station_altitude" value="3578.0 m" />
  <attribute name="ebas_measurement_height" value="2.0 m" />
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  <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
  <attribute name="ebas_humidity_temperaure_control_description" value="Sample dried to below 20% RH due to the heated inlet" />
  <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_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, , European Monitoring and Evaluation Programme, 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;, , The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., &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, Kjetil Tørseth, Kjetil Tørseth, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, kt@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Bukowiecki, Nicolas, , , , , , , , , &quot;, &quot;Baltensperger, Urs, , , , , , , , , &quot;, &quot;Brem, Benjamin, benjamin.brem@psi.ch, Paul Scherrer Institute, PSI, Laboratory of Atmospheric Chemistry, , , 5232, Villigen PSI, Switzerland&quot;, &quot;Gysel, Martin, , , , , , , , , &quot;, &quot;Gysel-Beer, Martin, martin.gysel@psi.ch, Paul Scherrer Institute, PSI, Laboratory of Atmospheric Chemistry, Forschungsstrasse 111, OFLA, 5232, Villigen PSI, Switzerland&quot;" />
  <attribute name="ebas_submitter" value="&quot;Bukowiecki, Nicolas, , , , , , , , , &quot;, &quot;Brem, Benjamin, benjamin.brem@psi.ch, Paul Scherrer Institute, PSI, Laboratory of Atmospheric Chemistry, , , 5232, Villigen PSI, Switzerland&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, CREATE, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
  <attribute name="ebas_comment" value="Adjustments to STP used Sample-T=25C, Sample-P=655hPa" />
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  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="standard_name_vocabulary" value="CF-1.7, ACDD-1.3" />
  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="70128" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="8" />
  <dimension name="d_Location" length="1" />
  <dimension name="qc_pressure_flags" length="3" />
  <dimension name="qc_temperature_flags" length="3" />
  <dimension name="qc_particle_number_concentration_amean_flags" length="3" />
  <dimension name="qc_particle_number_concentration_prec1587_flags" length="3" />
  <dimension name="qc_particle_number_concentration_perc8413_flags" length="3" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2015-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2025-12-31T23:30:00Z" />
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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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  <variable name="metadata_time_bnds" shape="metadata_time tbnds" type="double">
    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
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  <variable name="v_pressure" shape="d_Location time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="hPa" />
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    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_station_gaw_type" value="G" />
    <attribute name="ebas_station_wmo_region" type="long" value="6" />
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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 frameworks: ACTRIS, CREATE, EMEP, GAW-WDCA. Request acknowledgement details from data originator" />
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    <attribute name="cell_methods" value="time: mean" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="temperature" />
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