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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Particle_number_concentration at Harwell" />
  <attribute name="summary" value="Particle_number_concentration at Harwell. These measurements are gathered as a part of the following projects EMEP, EUSAAR, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['particle_number_concentration in aerosol (number_concentration_of_particles_in_dry_aerosol_particles_in_air)']" />
  <attribute name="keywords" value="Harwell GB0036R particle_number_concentration aerosol EMEP EUSAAR GAW-WDCA number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
  <attribute name="id" value="8ENR-5CKR.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="EMEP, EUSAAR, GAW-WDCA" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/8ENR-5CKR" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Harrison, R., EMEP, EUSAAR, GAW-WDCA, 2010, Particle_number_concentration at Harwell, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/8ENR-5CKR" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="GB04L &quot;Division of Environmental Health &amp; Risk Management, University of Birmingham&quot; &quot;Edgbaston, Birmingham B15 2 TT, United Kingdom&quot;" />
  <attribute name="date_created" value="2014-05-01T00:00:00.000000Z" />
  <attribute name="date_metadata_modified" value="2010-01-17T00:00:00Z" />
  <attribute name="creator_name" value="Roy Harrison" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="Sonya Beccaceci, David Beddows" />
  <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 (-1.316667 51.573056 137)" />
  <attribute name="geospatial_lat_min" type="double" value="51.573056" />
  <attribute name="geospatial_lat_max" type="double" value="51.573056" />
  <attribute name="geospatial_lon_min" type="double" value="-1.316667" />
  <attribute name="geospatial_lon_max" type="double" value="-1.316667" />
  <attribute name="geospatial_vertical_min" type="double" value="137.0" />
  <attribute name="geospatial_vertical_max" type="double" value="137.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2008-01-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2009-01-01T00:00:00Z" />
  <attribute name="time_coverage_duration" value="P0001-00-00T00:00:00" />
  <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="Harrison, R., EMEP, EUSAAR, GAW-WDCA, 2010, Particle_number_concentration at Harwell, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/8ENR-5CKR" />
  <attribute name="ebas_set_type_code" value="TU" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="8ENR-5CKR.nc" />
  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/8ENR-5CKR" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/8ENR-5CKR" />
  <attribute name="ebas_file_creation" value="2026-05-16T12:20:08.276609Z" />
  <attribute name="ebas_export_state" value="2014-05-01T00:00:00.000000Z" />
  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="2008-01-01T00:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2010-01-17T00:00:00.000000Z" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_period_code" value="1y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_station_code" value="GB0036R" />
  <attribute name="ebas_platform_code" value="GB0036S" />
  <attribute name="ebas_station_name" value="Harwell" />
  <attribute name="ebas_station_latitude" type="double" value="51.573056" />
  <attribute name="ebas_station_longitude" type="double" value="-1.316667" />
  <attribute name="ebas_station_altitude" value="137.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="particle_number_concentration" />
  <attribute name="ebas_unit" value="1/cm3" />
  <attribute name="ebas_matrix" value="aerosol" />
  <attribute name="ebas_laboratory_code" value="GB04L" />
  <attribute name="ebas_instrument_type" value="cpc" />
  <attribute name="ebas_instrument_name" value="cpc_GB04_no1" />
  <attribute name="ebas_method_ref" value="GB04L_cpc_ref" />
  <attribute name="ebas_organization" value="GB04L, &quot;Division of Environmental Health &amp; Risk Management, University of Birmingham&quot;, , , &quot;Edgbaston, Birmingham B15 2 TT, United Kingdom&quot;, , , , " />
  <attribute name="ebas_framework_acronym" value="EMEP, EUSAAR, GAW-WDCA" />
  <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, European Supersites for Atmospheric Aerosol Research, World Data Centre for Aerosols" />
  <attribute name="ebas_framework_description" value="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;Integration of measurements of atmospheric aerosol properties performed in a distributed network of 20 high quality European ground-based stations in support of policy issues on air quality, long-range transport of pollutants and climate change.&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="Kjetil Tørseth, Ann Mari Fjaeraa, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="kt@nilu.no, amf@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Harrison, Roy, , , , , , , , , &quot;" />
  <attribute name="ebas_submitter" value="&quot;Beccaceci, Sonya, , , , , , , , , &quot;, &quot;Beddows, David, , , , , , , , , &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: EMEP, EUSAAR, GAW-WDCA." />
  <attribute name="_NCProperties" value="version=2,netcdf=4.9.3,hdf5=1.14.6" />
  <attribute name="Metadata_Conventions" value="Unidata Dataset Discovery v1.0" />
  <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="processing_level" value="processing_level_test" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="8784" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="qc_particle_number_concentration_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2008-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2008-12-31T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3600.0" />
    <attribute name="time_coverage_duration" value="P0Y0M365DT23H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-05-18" />
    <attribute name="nciso_version" value="2.4.8" />
  </group>
  <variable name="time_bnds" shape="time tbnds" type="double">
    <attribute name="long_name" value="time bounds for measurement" />
  </variable>
  <variable name="metadata_time_bnds" shape="metadata_time tbnds" type="double">
    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
  </variable>
  <variable name="v_particle_number_concentration" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="1/cm3" />
    <attribute name="ancillary_variables" value="qc_particle_number_concentration meta_particle_number_concentration" />
    <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="2010-01-17T00:00:00.000000Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_station_code" value="GB0036R" />
    <attribute name="ebas_platform_code" value="GB0036S" />
    <attribute name="ebas_station_name" value="Harwell" />
    <attribute name="ebas_station_latitude" type="double" value="51.573056" />
    <attribute name="ebas_station_longitude" type="double" value="-1.316667" />
    <attribute name="ebas_station_altitude" value="137.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="particle_number_concentration" />
    <attribute name="ebas_unit" value="1/cm3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="GB04L" />
    <attribute name="ebas_instrument_type" value="cpc" />
    <attribute name="ebas_instrument_name" value="cpc_GB04_no1" />
    <attribute name="ebas_method_ref" value="GB04L_cpc_ref" />
    <attribute name="ebas_organization" value="GB04L, &quot;Division of Environmental Health &amp; Risk Management, University of Birmingham&quot;, , , &quot;Edgbaston, Birmingham B15 2 TT, United Kingdom&quot;, , , , " />
    <attribute name="ebas_framework_acronym" value="EMEP, EUSAAR, GAW-WDCA" />
    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, European Supersites for Atmospheric Aerosol Research, World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="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;Integration of measurements of atmospheric aerosol properties performed in a distributed network of 20 high quality European ground-based stations in support of policy issues on air quality, long-range transport of pollutants and climate change.&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="Kjetil Tørseth, Ann Mari Fjaeraa, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no, amf@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Harrison, Roy, , , , , , , , , &quot;" />
    <attribute name="ebas_submitter" value="&quot;Beccaceci, Sonya, , , , , , , , , &quot;, &quot;Beddows, David, , , , , , , , , &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: EMEP, EUSAAR, GAW-WDCA." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlenumberconcentration" />
    <attribute name="actris_variable_preferred_term" value="aerosol particle number concentration" />
    <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/condensationparticlecounter" />
    <attribute name="actris_instrument_type_preferred_term" value="condensation particle counter" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/EUSAAR, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA" />
    <attribute name="actris_framework_preferred_term" value="EMEP, EUSAAR, GAW-WDCA" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_particle_number_concentration" shape="qc_particle_number_concentration_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_particle_number_concentration" 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 1900-01-01T00:00:00Z" />
    <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>
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