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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="PM mass at Kårvatn" />
  <attribute name="keywords" value="pm25_mass, pm25, ACTRIS, NILU, pm10, pm10_pm25_mass, mass_concentration_of_pm2p5_ambient_aerosol_particles_in_air, Kårvatn, EMEP, pm10_pm25, mass_concentration_of_pm10_ambient_aerosol_particles_in_air, NO0039R, pm10_mass, mass_concentration_of_pm10_pm25_mass_in_pm10_minus_pm2p5_in_air" />
  <attribute name="id" value="NO0039R.20100503070000.20260316135817.low_vol_sampler...15y.1w...lev2.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="ACTRIS, EMEP, NILU" />
  <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 frameworks: EMEP, NILU.|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, EMEP, NILU." separator="|" />
  <attribute name="doi" value="https://doi.org/10.48597/V47J-W95E" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Aas, W., Yttri, K., ACTRIS, EMEP, NILU, 2026, PM mass at Kårvatn, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/V47J-W95E" />
  <attribute name="summary" value="PM mass at Kårvatn. These measurements are gathered as a part of the following projects ACTRIS, EMEP, NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: pm10_mass in pm10 (mass_concentration_of_pm10_ambient_aerosol_particles_in_air), pm10_pm25_mass in pm10_pm25 (mass_concentration_of_pm10_pm25_mass_in_pm10_minus_pm2p5_in_air), pm25_mass in pm25 (mass_concentration_of_pm2p5_ambient_aerosol_particles_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="NO01L, Norwegian Institute for Air Research, NILU, Instituttveien 18, 2007, Kjeller, Norway" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-03-16T13:58:17 UTC" />
  <attribute name="date_metadata_modified" value="2026-03-16T13:58:17 UTC" />
  <attribute name="creator_name" value="Wenche Aas, Karl Espen Yttri" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="waa@nilu.no, key@nilu.no" />
  <attribute name="creator_institution" value="&quot;Norwegian Institute for Air Research, Atmosphere and Climate Department, NILU&quot;, &quot;Norwegian Institute for Air Research, Atmosphere and Climate Department, NILU&quot;" />
  <attribute name="contributor_name" value="Anne Hjellbrekke, Wenche Aas, Erik Andresen" />
  <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" />
  <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 (62.783333 8.883333 210.0)" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="geospatial_lat_min" type="double" value="62.783333" />
  <attribute name="geospatial_lat_max" type="double" value="62.783333" />
  <attribute name="geospatial_lon_min" type="double" value="8.883333" />
  <attribute name="geospatial_lon_max" type="double" value="8.883333" />
  <attribute name="geospatial_vertical_min" type="double" value="210.0" />
  <attribute name="geospatial_vertical_max" type="double" value="210.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="time_coverage_start" value="2010-05-03T07:00:00 UTC" />
  <attribute name="time_coverage_end" value="2025-01-01T07:00:00 UTC" />
  <attribute name="time_coverage_duration" value="P0014-07-29T00:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-07T00:00:00" />
  <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="Aas, W., Yttri, K., ACTRIS, EMEP, NILU, 2026, PM mass at Kårvatn, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/V47J-W95E" />
  <attribute name="ebas_set_type_code" value="TI" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="NO0039R.20100503070000.20260316135817.low_vol_sampler...15y.1w...lev2.nc" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/V47J-W95E" />
  <attribute name="ebas_file_creation" value="2026-03-16T14:30:55.607736 UTC" />
  <attribute name="ebas_export_state" value="2026-03-16T14:25:03.073437 UTC" />
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  <attribute name="ebas_startdate" value="20100503070000" />
  <attribute name="ebas_revision_date" value="20260316135817" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="15y" />
  <attribute name="ebas_resolution_code" value="1w" />
  <attribute name="ebas_station_code" value="NO0039R" />
  <attribute name="ebas_platform_code" value="NO0039S" />
  <attribute name="ebas_station_name" value="Kårvatn" />
  <attribute name="ebas_station_latitude" value="62.783333" />
  <attribute name="ebas_station_longitude" value="8.883333" />
  <attribute name="ebas_station_altitude" value="210.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_unit" value="ug/m3" />
  <attribute name="ebas_laboratory_code" value="NO01L" />
  <attribute name="ebas_instrument_type" value="low_vol_sampler" />
  <attribute name="ebas_instrument_manufacturer" value="Leckel" />
  <attribute name="ebas_instrument_model" value="LVS3" />
  <attribute name="ebas_analytical_laboratory_code" value="NO01L" />
  <attribute name="ebas_analytical_measurement_technique" value="by_weight" />
  <attribute name="ebas_analytical_instrument_name" value="gravimetry" />
  <attribute name="ebas_standard_method" value="SOP=EN12341:2014" />
  <attribute name="ebas_inlet_type" value="Impactor--direct" />
  <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
  <attribute name="ebas_flow_rate" value="38.0 l/min" />
  <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
  <attribute name="ebas_exposed_filter_area" value="13.4 cm2" />
  <attribute name="ebas_filter_description" value="Whatman QM-A47mm" />
  <attribute name="ebas_medium" value="Quartz" />
  <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 h" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_volume_std_temperature" value="ambient" />
  <attribute name="ebas_volume_std_pressure" value="ambient" />
  <attribute name="ebas_measurement_uncertainty" value="0.1 ug/m3" />
  <attribute name="ebas_measurement_uncertainty_expl" value="includes uncertainties of 2 weighing processes (based on ref. lab blank weighings over a year) and volume flow measurement" />
  <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
  <attribute name="ebas_originator" value="Yttri, Karl Espen, key@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway" />
  <attribute name="ebas_submitter" value="Andresen, Erik, , Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway" />
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  <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="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;Aas, W., Yttri, K., ACTRIS, EMEP, NILU, 2026, PM mass at Kårvatn, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/V47J-W95E&quot;,&#xA;    &quot;Set type code&quot;: &quot;TI&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;NO0039R.20100503070000.20260316135817.low_vol_sampler...15y.1w...lev2.nc&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/V47J-W95E&quot;,&#xA;    &quot;File creation&quot;: &quot;2026-03-16T14:30:55.607736 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2026-03-16T14:25:03.073437 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20100503070000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20260316135817&quot;,&#xA;    &quot;Statistics&quot;: &quot;arithmetic mean&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;15y&quot;,&#xA;    &quot;Resolution code&quot;: &quot;1w&quot;,&#xA;    &quot;Station code&quot;: &quot;NO0039R&quot;,&#xA;    &quot;Platform code&quot;: &quot;NO0039S&quot;,&#xA;    &quot;Station name&quot;: &quot;Kårvatn&quot;,&#xA;    &quot;Station latitude&quot;: &quot;62.783333&quot;,&#xA;    &quot;Station longitude&quot;: &quot;8.883333&quot;,&#xA;    &quot;Station altitude&quot;: &quot;210.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Unit&quot;: &quot;ug/m3&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;NO01L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;low_vol_sampler&quot;,&#xA;    &quot;Instrument manufacturer&quot;: &quot;Leckel&quot;,&#xA;    &quot;Instrument model&quot;: &quot;LVS3&quot;,&#xA;    &quot;Analytical laboratory code&quot;: &quot;NO01L&quot;,&#xA;    &quot;Analytical measurement technique&quot;: &quot;by_weight&quot;,&#xA;    &quot;Analytical instrument name&quot;: &quot;gravimetry&quot;,&#xA;    &quot;Standard method&quot;: &quot;SOP=EN12341:2014&quot;,&#xA;    &quot;Inlet type&quot;: &quot;Impactor--direct&quot;,&#xA;    &quot;Inlet description&quot;: &quot;Upward facing with rain shield&quot;,&#xA;    &quot;Flow rate&quot;: &quot;38.0 l/min&quot;,&#xA;    &quot;Filter face velocity&quot;: &quot;47.0 cm/s&quot;,&#xA;    &quot;Exposed filter area&quot;: &quot;13.4 cm2&quot;,&#xA;    &quot;Filter description&quot;: &quot;Whatman QM-A47mm&quot;,&#xA;    &quot;Medium&quot;: &quot;Quartz&quot;,&#xA;    &quot;Filter prefiring&quot;: &quot;1123.15 K, 3.0 h&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;None&quot;,&#xA;    &quot;Volume std. temperature&quot;: &quot;ambient&quot;,&#xA;    &quot;Volume std. pressure&quot;: &quot;ambient&quot;,&#xA;    &quot;Measurement uncertainty&quot;: &quot;0.1 ug/m3&quot;,&#xA;    &quot;Measurement uncertainty expl.&quot;: &quot;includes uncertainties of 2 weighing processes (based on ref. lab blank weighings over a year) and volume flow measurement&quot;,&#xA;    &quot;Organization&quot;: &quot;NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway&quot;,&#xA;    &quot;Originator&quot;: &quot;Yttri, Karl Espen, key@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&quot;,&#xA;    &quot;Submitter&quot;: &quot;Andresen, Erik, , Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway&quot;&#xA;}" />
  <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="494" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="6" />
  <dimension name="pm10_mass_qc_flags" length="3" />
  <dimension name="pm10_pm25_mass_qc_flags" length="3" />
  <dimension name="pm25_mass_qc_flags" length="3" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2010-05-06T19:00:00Z" />
    <attribute name="time_coverage_end" value="2024-12-29T19:00:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="937781.0" />
    <attribute name="time_coverage_duration" value="P0Y0M5351DT0H0M0.000S" />
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    <attribute name="metadata_creation" value="2026-04-05" />
    <attribute name="nciso_version" value="2.4.7" />
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    <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>
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="pm10_mass_qc pm10_mass_ebasmetadata" />
    <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="20260310122621" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_station_code" value="NO0039R" />
    <attribute name="ebas_platform_code" value="NO0039S" />
    <attribute name="ebas_station_name" value="Kårvatn" />
    <attribute name="ebas_station_latitude" value="62.783333" />
    <attribute name="ebas_station_longitude" value="8.883333" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="pm10_mass" />
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    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 h" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_volume_std_pressure" value="ambient" />
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    <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
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    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, Norwegian Institute for Air Research" />
    <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., Atmospheric measuremnts produced at NILU." />
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    <attribute name="ebas_framework_contact_email" value="kt@nilu.no, kt@nilu.no" />
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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: EMEP, NILU." />
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    <attribute name="_FillValue" type="double" value="NaN" />
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    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="pm10_pm25_mass_qc pm10_pm25_mass_ebasmetadata" />
    <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_station_latitude" value="62.783333" />
    <attribute name="ebas_station_longitude" value="8.883333" />
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    <attribute name="ebas_volume_std_pressure" value="ambient" />
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  <variable name="pm25_mass" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_pm2p5_ambient_aerosol_particles_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="pm25_mass_qc pm25_mass_ebasmetadata" />
    <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="20260316135817" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_station_code" value="NO0039R" />
    <attribute name="ebas_platform_code" value="NO0039S" />
    <attribute name="ebas_station_name" value="Kårvatn" />
    <attribute name="ebas_station_latitude" value="62.783333" />
    <attribute name="ebas_station_longitude" value="8.883333" />
    <attribute name="ebas_station_altitude" value="210.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="pm25_mass" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="pm25" />
    <attribute name="ebas_laboratory_code" value="NO01L" />
    <attribute name="ebas_instrument_type" value="low_vol_sampler" />
    <attribute name="ebas_instrument_name" value="kfg_no39_pm25" />
    <attribute name="ebas_instrument_manufacturer" value="Leckel" />
    <attribute name="ebas_instrument_model" value="LVS3" />
    <attribute name="ebas_analytical_laboratory_code" value="NO01L" />
    <attribute name="ebas_analytical_measurement_technique" value="by_weight" />
    <attribute name="ebas_analytical_instrument_name" value="gravimetry" />
    <attribute name="ebas_method_ref" value="NO01L_gravimetry" />
    <attribute name="ebas_standard_method" value="SOP=EN12341:2014" />
    <attribute name="ebas_inlet_type" value="Impactor--direct" />
    <attribute name="ebas_inlet_description" value="Upward facing with rain shield" />
    <attribute name="ebas_flow_rate" value="38.0 l/min" />
    <attribute name="ebas_filter_face_velocity" value="47.0 cm/s" />
    <attribute name="ebas_exposed_filter_area" value="13.4 cm2" />
    <attribute name="ebas_filter_description" value="Whatman QM-A47mm" />
    <attribute name="ebas_medium" value="Quartz" />
    <attribute name="ebas_filter_prefiring" value="1123.15 K, 3.0 h" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="ambient" />
    <attribute name="ebas_volume_std_pressure" value="ambient" />
    <attribute name="ebas_measurement_uncertainty" value="0.1 ug/m3" />
    <attribute name="ebas_measurement_uncertainty_expl" value="includes uncertainties of 2 weighing processes (based on ref. lab blank weighings over a year) and volume flow measurement" />
    <attribute name="ebas_organization" value="NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway" />
    <attribute name="ebas_framework_acronym" value="EMEP, NILU" />
    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, Norwegian Institute for Air Research" />
    <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., Atmospheric measuremnts produced at NILU." />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="Yttri, Karl Espen, key@nilu.no, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway" />
    <attribute name="ebas_submitter" value="Andresen, Erik, , Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway" />
    <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, NILU." />
  </variable>
  <variable name="pm25_mass_qc" shape="pm25_mass_qc_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="pm25_mass_ebasmetadata" 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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <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 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
</netcdf>
