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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ground based in situ observations of n-butane at Summit (DK0025G) using online_gc" />
  <attribute name="keywords" value="mole_fraction_of_butane_in_air, Summit, air, GAW-WDCRG, n-butane, DK0025G, mass_concentration_of_n-butane_in_air" />
  <attribute name="id" value="P6ED-NTBR.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="GAW-WDCRG" />
  <attribute name="acknowledgement" value="Request acknowledgement details from data originator" />
  <attribute name="doi" value="https://doi.org/10.48597/P6ED-NTBR" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Detlev Helmig, Jacques Hueber, n-butane - online_gc at Summit, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/P6ED-NTBR" />
  <attribute name="summary" value="Ground based in situ observations of n-butane at Summit (DK0025G) using online_gc. These measurements are gathered as a part of the following projects GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: n-butane in air (mass_concentration_of_n-butane_in_air), n-butane in air (mole_fraction_of_butane_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="US13L, University of Colorado - INSTAAR, INSTAAR, Institute of Arctic and Alpine Research, 4001 Discovery Drive, Rm N202, CO 80303, Boulder, USA" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2020-10-13T00:00:00 UTC" />
  <attribute name="date_metadata_modified" value="2020-10-13T00:00:00 UTC" />
  <attribute name="creator_name" value="Detlev Helmig, Jacques Hueber" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="Detlev.Helmig@colorado.edu, Jacques.hueber@colorado.edu" />
  <attribute name="creator_institution" value="&quot;University of Colorado - INSTAAR, Institute of Arctic and Alpine Research, INSTAAR&quot;, &quot;Institute of Artic and Alpine Research, Atmospheric Research Lab, INSTAAR&quot;" />
  <attribute name="contributor_name" value="Detlev Helmig, Jacques Hueber" />
  <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/" />
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  <attribute name="time_coverage_start" value="2008-07-03T04:30:00 UTC" />
  <attribute name="time_coverage_end" value="2015-01-01T00:37:00 UTC" />
  <attribute name="time_coverage_duration" value="P0006-05-28T20:07:00" />
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  <attribute name="timezone" value="UTC" />
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  <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="ebas_citation" value="Detlev Helmig, Jacques Hueber, n-butane - online_gc at Summit, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/P6ED-NTBR" />
  <attribute name="ebas_set_type_code" value="TI" />
  <attribute name="ebas_timezone" value="UTC" />
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  <attribute name="ebas_file_creation" value="2023-12-08T13:24:49.774642 UTC" />
  <attribute name="ebas_export_state" value="2021-04-30T08:06:07.847000 UTC" />
  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="20080703043000" />
  <attribute name="ebas_revision_date" value="20201013000000" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="6y" />
  <attribute name="ebas_resolution_code" value="2h" />
  <attribute name="ebas_sample_duration" value="30mn" />
  <attribute name="ebas_station_code" value="DK0025G" />
  <attribute name="ebas_platform_code" value="DK0025S" />
  <attribute name="ebas_station_name" value="Summit" />
  <attribute name="ebas_station_wdca_id" value="GAWADK__SUM" />
  <attribute name="ebas_station_gaw_id" value="SUM" />
  <attribute name="ebas_station_gaw_name" value="Summit" />
  <attribute name="ebas_station_land_use" value="Snowfield" />
  <attribute name="ebas_station_setting" value="Polar" />
  <attribute name="ebas_station_gaw_type" value="G" />
  <attribute name="ebas_station_wmo_region" value="6" />
  <attribute name="ebas_station_latitude" value="72.5800018311" />
  <attribute name="ebas_station_longitude" value="-38.4799995422" />
  <attribute name="ebas_station_altitude" value="3238.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="n-butane" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="US13L" />
  <attribute name="ebas_instrument_type" value="online_gc" />
  <attribute name="ebas_instrument_name" value="sum_online_gc" />
  <attribute name="ebas_method_ref" value="US13L_gc_fid" />
  <attribute name="ebas_organization" value="US13L, University of Colorado - INSTAAR, INSTAAR, Institute of Arctic and Alpine Research, &quot;4001 Discovery Drive, Rm N202&quot;, , CO 80303, Boulder, USA" />
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  <attribute name="ebas_framework_description" value="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" />
  <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
  <attribute name="ebas_originator" value="Hueber, Jacques, Jacques.hueber@colorado.edu, Institute of Artic and Alpine Research, INSTAAR, Atmospheric Research Lab, 4001 Discovery Drive, , 80303, Boulder Colorado, United States" />
  <attribute name="ebas_submitter" value="Hueber, Jacques, Jacques.hueber@colorado.edu, Institute of Artic and Alpine Research, INSTAAR, Atmospheric Research Lab, 4001 Discovery Drive, , 80303, Boulder Colorado, United States" />
  <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
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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;Detlev Helmig, Jacques Hueber, n-butane - online_gc at Summit, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/P6ED-NTBR&quot;,&#xA;    &quot;Set type code&quot;: &quot;TI&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;P6ED-NTBR.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/P6ED-NTBR&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/P6ED-NTBR&quot;,&#xA;    &quot;File creation&quot;: &quot;2023-12-08T13:24:49.774642 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2021-04-30T08:06:07.847000 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20080703043000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20201013000000&quot;,&#xA;    &quot;Statistics&quot;: &quot;arithmetic mean&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;6y&quot;,&#xA;    &quot;Resolution code&quot;: &quot;2h&quot;,&#xA;    &quot;Sample duration&quot;: &quot;30mn&quot;,&#xA;    &quot;Station code&quot;: &quot;DK0025G&quot;,&#xA;    &quot;Platform code&quot;: &quot;DK0025S&quot;,&#xA;    &quot;Station name&quot;: &quot;Summit&quot;,&#xA;    &quot;Station WDCA-ID&quot;: &quot;GAWADK__SUM&quot;,&#xA;    &quot;Station GAW-ID&quot;: &quot;SUM&quot;,&#xA;    &quot;Station GAW-Name&quot;: &quot;Summit&quot;,&#xA;    &quot;Station land use&quot;: &quot;Snowfield&quot;,&#xA;    &quot;Station setting&quot;: &quot;Polar&quot;,&#xA;    &quot;Station GAW type&quot;: &quot;G&quot;,&#xA;    &quot;Station WMO region&quot;: &quot;6&quot;,&#xA;    &quot;Station latitude&quot;: &quot;72.5800018311&quot;,&#xA;    &quot;Station longitude&quot;: &quot;-38.4799995422&quot;,&#xA;    &quot;Station altitude&quot;: &quot;3238.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Component&quot;: &quot;n-butane&quot;,&#xA;    &quot;Matrix&quot;: &quot;air&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;US13L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;online_gc&quot;,&#xA;    &quot;Instrument name&quot;: &quot;sum_online_gc&quot;,&#xA;    &quot;Method ref&quot;: &quot;US13L_gc_fid&quot;,&#xA;    &quot;Organization&quot;: &quot;US13L, University of Colorado - INSTAAR, INSTAAR, Institute of Arctic and Alpine Research, \&quot;4001 Discovery Drive, Rm N202\&quot;, , CO 80303, Boulder, USA&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;GAW-WDCRG&quot;,&#xA;    &quot;Framework name&quot;: &quot;World Data Centre for Reactive Gases&quot;,&#xA;    &quot;Framework description&quot;: &quot;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.&quot;,&#xA;    &quot;Framework contact name&quot;: &quot;Kjetil Tørseth&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;kt@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Hueber, Jacques, Jacques.hueber@colorado.edu, Institute of Artic and Alpine Research, INSTAAR, Atmospheric Research Lab, 4001 Discovery Drive, , 80303, Boulder Colorado, United States&quot;,&#xA;    &quot;Submitter&quot;: &quot;Hueber, Jacques, Jacques.hueber@colorado.edu, Institute of Artic and Alpine Research, INSTAAR, Atmospheric Research Lab, 4001 Discovery Drive, , 80303, Boulder Colorado, United States&quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;Request acknowledgement details from data originator&quot;&#xA;}" />
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  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="time" length="7558" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="n-butane_ng_per_m3_qc_flags" length="1" />
  <dimension name="n-butane_pmol_per_mol_qc_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2008-07-03T04:45:00Z" />
    <attribute name="time_coverage_end" value="2015-01-01T00:22:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="27128.0" />
    <attribute name="time_coverage_duration" value="P0Y0M2372DT19H37M0.000S" />
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  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-05-17" />
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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="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ng/m3" />
    <attribute name="ancillary_variables" value="n-butane_ng_per_m3_qc n-butane_ng_per_m3_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="20201013000000" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="30mn" />
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    <attribute name="ebas_component" value="n-butane" />
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    <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Data imported from WDCGG -- Data converted on export from EBAS from 'pmol/mol' to 'ng/m3' at 273.15 K, 1013.25 hPa, conversion factor 2.59." />
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    <attribute name="ebas_framework_name" value="World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="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." />
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    <attribute name="ebas_acknowledgement" value="Request acknowledgement details from data originator" />
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