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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ozone at Kollumerwaard" />
  <attribute name="summary" value="Ozone at Kollumerwaard. These measurements are gathered as a part of the following projects EMEP, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['ozone in air (mole_fraction_of_ozone_in_air)', 'ozone in air (mass_concentration_of_ozone_in_air)']" />
  <attribute name="keywords" value="Kollumerwaard NL0009R ozone air EMEP GAW-WDCRG mole_fraction_of_ozone_in_air mass_concentration_of_ozone_in_air" />
  <attribute name="id" value="FBNF-2JZQ.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="EMEP, GAW-WDCRG" />
  <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, GAW-WDCRG." />
  <attribute name="doi" value="https://doi.org/10.48597/FBNF-2JZQ" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Spoor, R., Bjerk, L., Bjerke, L., EMEP, GAW-WDCRG, 2026, Ozone at Kollumerwaard, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/FBNF-2JZQ" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="NL01L &quot;Rijks institut voor volksgezondheid en milieuhygiene&quot; RIVM &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-09-29T11:45:30.025942Z" />
  <attribute name="date_metadata_modified" value="2026-09-29T11:45:30Z" />
  <attribute name="creator_name" value="Ronald Spoor, Lise Bjerk, Lise Bjerke" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value=", lise.bjerk@rivm.nl, lise.bjerke@rivm.nl" />
  <attribute name="creator_institution" value=", &quot;Rijksinstituut voor Volksgezondheid en Milieu, MIL, RIVM&quot;, &quot;Rijksinstituut voor Volksgezondheid en Milieu, MIL, RIVM&quot;" />
  <attribute name="contributor_name" value="Mirian Wietses" />
  <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" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
  <attribute name="geospatial_bounds" value="POINT Z (6.277222 53.333889 1)" />
  <attribute name="geospatial_lat_min" type="double" value="53.333889" />
  <attribute name="geospatial_lat_max" type="double" value="53.333889" />
  <attribute name="geospatial_lon_min" type="double" value="6.277222" />
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  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2022-01-01T00:00:00Z" />
  <attribute name="time_coverage_end" value="2026-01-01T00:00:00Z" />
  <attribute name="time_coverage_duration" value="P0004-00-00T00:00:00" />
  <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="Spoor, R., Bjerk, L., Bjerke, L., EMEP, GAW-WDCRG, 2026, Ozone at Kollumerwaard, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/FBNF-2JZQ" />
  <attribute name="ebas_set_type_code" value="TU" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="FBNF-2JZQ.nc" />
  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/FBNF-2JZQ" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/FBNF-2JZQ" />
  <attribute name="ebas_file_creation" value="2026-09-29T11:51:54.370578Z" />
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  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="2022-01-01T00:00:00.000000Z" />
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  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="initial revision, manually inspected" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="4y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_station_code" value="NL0009R" />
  <attribute name="ebas_platform_code" value="NL0009S" />
  <attribute name="ebas_station_name" value="Kollumerwaard" />
  <attribute name="ebas_station_latitude" type="double" value="53.333889" />
  <attribute name="ebas_station_longitude" type="double" value="6.277222" />
  <attribute name="ebas_station_altitude" value="1.0 m" />
  <attribute name="ebas_measurement_altitude" value="1.0 m" />
  <attribute name="ebas_measurement_height" value="2.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="ozone" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="NL01L" />
  <attribute name="ebas_instrument_type" value="uv_abs" />
  <attribute name="ebas_instrument_name" value="TE49W_nl0009" />
  <attribute name="ebas_method_ref" value="NL01L_MIL-W-5401_NL01L_ILG-W-2900" />
  <attribute name="ebas_blank_correction" value="Not blank corrected" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit, flagged with 780" />
  <attribute name="ebas_absorption_cross_section" value="CCQM.O3.2019" />
  <attribute name="ebas_organization" value="NL01L, Rijks institut voor volksgezondheid en milieuhygiene, RIVM, , &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;, , , , " />
  <attribute name="ebas_framework_acronym" value="EMEP, GAW-WDCRG" />
  <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
  <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., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
  <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="&quot;Spoor, Ronald, , , , , , , , , &quot;, &quot;Bjerk, Lise, lise.bjerk@rivm.nl, Rijksinstituut voor Volksgezondheid en Milieu, RIVM, MIL, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;, &quot;Bjerke, Lise, lise.bjerke@rivm.nl, Rijksinstituut voor Volksgezondheid en Milieu, RIVM, MIL, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;" />
  <attribute name="ebas_submitter" value="&quot;Wietses, Mirian, mirian.wietses@rivm.nl, Rijks instituut voor volksgezondheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&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, GAW-WDCRG." />
  <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="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="35064" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="4" />
  <dimension name="qc_ozone_nmol_per_mol_flags" length="1" />
  <dimension name="qc_ozone_ug_per_m3_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2022-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2025-12-31T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3600.0" />
    <attribute name="time_coverage_duration" value="P0Y0M1460DT23H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-11-07" />
    <attribute name="nciso_version" value="2.4.9" />
  </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_ozone_nmol_per_mol" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="qc_ozone_nmol_per_mol meta_ozone_nmol_per_mol" />
    <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="2026-09-29T11:45:30.025942Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_station_code" value="NL0009R" />
    <attribute name="ebas_platform_code" value="NL0009S" />
    <attribute name="ebas_station_name" value="Kollumerwaard" />
    <attribute name="ebas_station_latitude" type="double" value="53.333889" />
    <attribute name="ebas_station_longitude" type="double" value="6.277222" />
    <attribute name="ebas_station_altitude" value="1.0 m" />
    <attribute name="ebas_measurement_altitude" value="1.0 m" />
    <attribute name="ebas_measurement_height" value="2.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="NL01L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="TE49W_nl0009" />
    <attribute name="ebas_method_ref" value="NL01L_MIL-W-5401_NL01L_ILG-W-2900" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit, flagged with 780" />
    <attribute name="ebas_absorption_cross_section" value="CCQM.O3.2019" />
    <attribute name="ebas_organization" value="NL01L, Rijks institut voor volksgezondheid en milieuhygiene, RIVM, , &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;, , , , " />
    <attribute name="ebas_framework_acronym" value="EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <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., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <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="&quot;Spoor, Ronald, , , , , , , , , &quot;, &quot;Bjerk, Lise, lise.bjerk@rivm.nl, Rijksinstituut voor Volksgezondheid en Milieu, RIVM, MIL, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;, &quot;Bjerke, Lise, lise.bjerke@rivm.nl, Rijksinstituut voor Volksgezondheid en Milieu, RIVM, MIL, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;" />
    <attribute name="ebas_submitter" value="&quot;Wietses, Mirian, mirian.wietses@rivm.nl, Rijks instituut voor volksgezondheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&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, GAW-WDCRG." />
    <attribute name="ebas_comment" value="Data converted on export from EBAS from 'ug/m3' at 293.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 0.501." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ozoneamountfraction" />
    <attribute name="actris_variable_preferred_term" value="ozone amount fraction" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas 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/ultra-violetabsorptiondetector" />
    <attribute name="actris_instrument_type_preferred_term" value="ultra-violet fluorescence detector" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="EMEP, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="qc_ozone_nmol_per_mol" shape="qc_ozone_nmol_per_mol_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" />
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  <variable name="meta_ozone_nmol_per_mol" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ozone_ug_per_m3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="qc_ozone_ug_per_m3 meta_ozone_ug_per_m3" />
    <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="2026-09-29T11:45:30.025942Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_station_code" value="NL0009R" />
    <attribute name="ebas_platform_code" value="NL0009S" />
    <attribute name="ebas_station_name" value="Kollumerwaard" />
    <attribute name="ebas_station_latitude" type="double" value="53.333889" />
    <attribute name="ebas_station_longitude" type="double" value="6.277222" />
    <attribute name="ebas_station_altitude" value="1.0 m" />
    <attribute name="ebas_measurement_altitude" value="1.0 m" />
    <attribute name="ebas_measurement_height" value="2.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="NL01L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="TE49W_nl0009" />
    <attribute name="ebas_method_ref" value="NL01L_MIL-W-5401_NL01L_ILG-W-2900" />
    <attribute name="ebas_blank_correction" value="Not blank corrected" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero/negative values reported as measured if within detection limit, flagged with 780" />
    <attribute name="ebas_absorption_cross_section" value="CCQM.O3.2019" />
    <attribute name="ebas_organization" value="NL01L, Rijks institut voor volksgezondheid en milieuhygiene, RIVM, , &quot;Antoine van Leeuwenhoeklaan 9, Postbus 1, NL-3720 BA BILTHOVEN, The Netherlands&quot;, , , , " />
    <attribute name="ebas_framework_acronym" value="EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <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., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <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="&quot;Spoor, Ronald, , , , , , , , , &quot;, &quot;Bjerk, Lise, lise.bjerk@rivm.nl, Rijksinstituut voor Volksgezondheid en Milieu, RIVM, MIL, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;, &quot;Bjerke, Lise, lise.bjerke@rivm.nl, Rijksinstituut voor Volksgezondheid en Milieu, RIVM, MIL, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&quot;" />
    <attribute name="ebas_submitter" value="&quot;Wietses, Mirian, mirian.wietses@rivm.nl, Rijks instituut voor volksgezondheid en milieu, RIVM, ILG, P.O. Box 1, , 3720BA, Bilthoven, Netherlands&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, GAW-WDCRG." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ozonemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ozone mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
    <attribute name="actris_matrix_preferred_term" value="gas 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/ultra-violetabsorptiondetector" />
    <attribute name="actris_instrument_type_preferred_term" value="ultra-violet fluorescence detector" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG" />
    <attribute name="actris_framework_preferred_term" value="EMEP, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ozone_ug_per_m3" shape="qc_ozone_ug_per_m3_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_ozone_ug_per_m3" 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>
</netcdf>
