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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 Broomfield Soaring Eagle Park" />
  <attribute name="summary" value="Ozone at Broomfield Soaring Eagle Park. These measurements are gathered as a part of the following projects Independent 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="&quot;Broomfield Soaring Eagle Park&quot; US0106R ozone air Independent mole_fraction_of_ozone_in_air mass_concentration_of_ozone_in_air" />
  <attribute name="id" value="RG2N-8EPX.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="Independent" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/RG2N-8EPX" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Helmig, D., Independent, 2026, Ozone at Broomfield Soaring Eagle Park, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/RG2N-8EPX" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="US17L &quot;Boulder Atmosphere Innovation Research LLC&quot; &quot;Boulder AIR&quot; &quot;2820 Lafayette Drive&quot; 80305 Boulder USA" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-08T09:18:43.384922Z" />
  <attribute name="date_metadata_modified" value="2026-06-08T09:18:43Z" />
  <attribute name="creator_name" value="Detlev Helmig" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="dh.bouldair@gmail.com" />
  <attribute name="creator_institution" value="&quot;Boulder Atmosphere Innovation Research LLC, Boulder AIR&quot;" />
  <attribute name="contributor_name" value="Detlev Helmig" />
  <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 (-105.036 39.984 1607)" />
  <attribute name="geospatial_lat_min" type="double" value="39.984" />
  <attribute name="geospatial_lat_max" type="double" value="39.984" />
  <attribute name="geospatial_lon_min" type="double" value="-105.036" />
  <attribute name="geospatial_lon_max" type="double" value="-105.036" />
  <attribute name="geospatial_vertical_min" type="double" value="1607.0" />
  <attribute name="geospatial_vertical_max" type="double" value="1607.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="time_coverage_start" value="2020-04-02T00:00:00Z" />
  <attribute name="time_coverage_end" value="2024-12-31T19:00:00Z" />
  <attribute name="time_coverage_duration" value="P0004-08-29T19:00:00" />
  <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="Helmig, D., Independent, 2026, Ozone at Broomfield Soaring Eagle Park, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/RG2N-8EPX" />
  <attribute name="ebas_set_type_code" value="TI" />
  <attribute name="ebas_timezone" value="UTC" />
  <attribute name="ebas_file_name" value="RG2N-8EPX.nc" />
  <attribute name="ebas_represents_doi" value="https://doi.org/10.48597/RG2N-8EPX" />
  <attribute name="ebas_contains_doi" value="https://doi.org/10.48597/RG2N-8EPX" />
  <attribute name="ebas_file_creation" value="2026-06-14T01:04:25.381252Z" />
  <attribute name="ebas_export_state" value="2026-06-08T09:18:43.384922Z" />
  <attribute name="ebas_export_filter" value="exclude-900,exclude-invalid" />
  <attribute name="ebas_startdate" value="2020-04-02T00:00:00.000000Z" />
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  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="initial revision,manually inspected" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="5y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_orig_time_res" value="1mn" />
  <attribute name="ebas_station_code" value="US0106R" />
  <attribute name="ebas_platform_code" value="US0106S" />
  <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
  <attribute name="ebas_station_state_province" value="CO" />
  <attribute name="ebas_station_land_use" value="Residential" />
  <attribute name="ebas_station_setting" value="Suburban" />
  <attribute name="ebas_station_latitude" type="double" value="39.984" />
  <attribute name="ebas_station_longitude" type="double" value="-105.036" />
  <attribute name="ebas_station_altitude" value="1607.0 m" />
  <attribute name="ebas_measurement_height" value="5.1 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="US17L" />
  <attribute name="ebas_instrument_type" value="uv_abs" />
  <attribute name="ebas_instrument_name" value="49C15_BSE" />
  <attribute name="ebas_instrument_manufacturer" value="Thermo" />
  <attribute name="ebas_instrument_model" value="49C" />
  <attribute name="ebas_instrument_serial_number" value="49CPS-55502-304" />
  <attribute name="ebas_method_ref" value="US17L_1O3" />
  <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
  <attribute name="ebas_inlet_tube_material" value="Teflon" />
  <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
  <attribute name="ebas_inlet_tube_length" value="7.0 m" />
  <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
  <attribute name="ebas_flow_rate" value="1.3 l/min" />
  <attribute name="ebas_filter_description" value="5 micron Teflon" />
  <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
  <attribute name="ebas_zero_span_check_type" value="automatic" />
  <attribute name="ebas_zero_span_check_interval" value="1d" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
  <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
  <attribute name="ebas_qa1_measure_id" value="US17L_reference_calibration_20210520" />
  <attribute name="ebas_qa1_date" value="2021-06-25T00:00:00Z" />
  <attribute name="ebas_qa1_outcome" value="pass" />
  <attribute name="ebas_qa1_bias" value="0.55 %" />
  <attribute name="ebas_qa1_document_name" value="49C_15_2021_0625.pdf" />
  <attribute name="ebas_qa1_document_url" value="https://www.bouldair.com/qc_reports/49C_15_2021_0625.pdf" />
  <attribute name="ebas_qa2_measure_id" value="US17L_reference_calibration_20220504" />
  <attribute name="ebas_qa2_date" value="2022-05-25T00:00:00Z" />
  <attribute name="ebas_qa2_outcome" value="pass" />
  <attribute name="ebas_qa2_bias" value="1.39 %" />
  <attribute name="ebas_qa2_document_name" value="49C_15_2022_0525.pdf" />
  <attribute name="ebas_qa2_document_url" value="https://www.bouldair.com/qc_reports/49C_15_2022_0525.pdf" />
  <attribute name="ebas_qa3_measure_id" value="US17L_reference_calibration_20220504" />
  <attribute name="ebas_qa3_date" value="2022-05-26T00:00:00Z" />
  <attribute name="ebas_qa3_outcome" value="pass" />
  <attribute name="ebas_qa3_bias" value="-1.38 %" />
  <attribute name="ebas_qa3_document_name" value="49C#_5_2022_0526.pdf" />
  <attribute name="ebas_qa3_document_url" value="https://www.bouldair.com/qc_reports/49C_15_2022_0526.pdf" />
  <attribute name="ebas_qa4_measure_id" value="US17L_reference_calibration_20220504" />
  <attribute name="ebas_qa4_date" value="2023-11-14T00:00:00Z" />
  <attribute name="ebas_qa4_outcome" value="pass" />
  <attribute name="ebas_qa4_bias" value="-0.12 %" />
  <attribute name="ebas_qa4_document_name" value="49C_15_2023_1114.pdf" />
  <attribute name="ebas_qa4_document_url" value="https://www.bouldair.com/qc_reports/49C_15_2022_0526.pdf" />
  <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
  <attribute name="ebas_framework_acronym" value="Independent" />
  <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
  <attribute name="ebas_framework_description" value="&quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;&quot;Independent&quot;&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;" />
  <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
  <attribute name="ebas_submitter" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
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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="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="38697" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="2" />
  <dimension name="qc_ozone_nmol_per_mol_amean_flags" length="1" />
  <dimension name="qc_ozone_ug_per_m3_amean_flags" length="1" />
  <dimension name="qc_ozone_nmol_per_mol_max_flags" length="1" />
  <dimension name="qc_ozone_ug_per_m3_max_flags" length="1" />
  <dimension name="qc_ozone_nmol_per_mol_min_flags" length="1" />
  <dimension name="qc_ozone_ug_per_m3_min_flags" length="1" />
  <dimension name="qc_ozone_nmol_per_mol_stddev_flags" length="1" />
  <dimension name="qc_ozone_ug_per_m3_stddev_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2020-04-02T00:30:00Z" />
    <attribute name="time_coverage_end" value="2024-12-31T18:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3873.0" />
    <attribute name="time_coverage_duration" value="P0Y0M1734DT18H0M0.000S" />
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  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-06-20" />
    <attribute name="nciso_version" value="2.4.8" />
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  <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_amean" 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_amean meta_ozone_nmol_per_mol_amean" />
    <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="2026-06-08T09:18:43.384922Z" />
    <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_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0106R" />
    <attribute name="ebas_platform_code" value="US0106S" />
    <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="39.984" />
    <attribute name="ebas_station_longitude" type="double" value="-105.036" />
    <attribute name="ebas_station_altitude" value="1607.0 m" />
    <attribute name="ebas_measurement_height" value="5.1 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="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C15_BSE" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49CPS-55502-304" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
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    <attribute name="ebas_inlet_tube_length" value="7.0 m" />
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    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_qa1_variability" value="0.2 nmol/mol" />
    <attribute name="ebas_qa2_variability" value="0.2 nmol/mol" />
    <attribute name="ebas_qa3_variability" value="0.1 nmol/mol" />
    <attribute name="ebas_qa4_variability" value="0.1 nmol/mol" />
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    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="&quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;&quot;Independent&quot;&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
    <attribute name="ebas_submitter" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953. -- Data converted on export from EBAS from 'ug/m3' at 293.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 0.501. Detection limit converted from '2.0 ug/m3' at 293.15 K, 1013.25 hPa to '1.0 nmol/mol', conversion factor 0.501. QA variability from '0.38 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.34 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.22 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 nmol/mol', conversion factor 0.501. QA variability from '0.28 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 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="" />
    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ozone_nmol_per_mol_amean" shape="qc_ozone_nmol_per_mol_amean_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_nmol_per_mol_amean" 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_amean" 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_amean meta_ozone_ug_per_m3_amean" />
    <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="2026-06-08T09:18:43.384922Z" />
    <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_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0106R" />
    <attribute name="ebas_platform_code" value="US0106S" />
    <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="39.984" />
    <attribute name="ebas_station_longitude" type="double" value="-105.036" />
    <attribute name="ebas_station_altitude" value="1607.0 m" />
    <attribute name="ebas_measurement_height" value="5.1 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="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C15_BSE" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49CPS-55502-304" />
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    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="7.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_qa1_variability" value="0.38 ug/m3" />
    <attribute name="ebas_qa2_variability" value="0.34 ug/m3" />
    <attribute name="ebas_qa3_variability" value="0.22 ug/m3" />
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    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
    <attribute name="ebas_submitter" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ozonemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ozone mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_instrument_type_preferred_term" value="ultra-violet fluorescence detector" />
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    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ozone_ug_per_m3_amean" shape="qc_ozone_ug_per_m3_amean_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_amean" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ozone_nmol_per_mol_max" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ozone_in_air" />
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    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="qc_ozone_nmol_per_mol_max meta_ozone_nmol_per_mol_max" />
    <attribute name="cell_methods" value="time: maximum" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-06-08T09:18:43.384922Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="maximum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0106R" />
    <attribute name="ebas_platform_code" value="US0106S" />
    <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="39.984" />
    <attribute name="ebas_station_longitude" type="double" value="-105.036" />
    <attribute name="ebas_station_altitude" value="1607.0 m" />
    <attribute name="ebas_measurement_height" value="5.1 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
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    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C15_BSE" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
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    <attribute name="ebas_flow_rate" value="1.3 l/min" />
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    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
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    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_qa1_variability" value="0.2 nmol/mol" />
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    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
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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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953. -- Data converted on export from EBAS from 'ug/m3' at 293.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 0.501. Detection limit converted from '2.0 ug/m3' at 293.15 K, 1013.25 hPa to '1.0 nmol/mol', conversion factor 0.501. QA variability from '0.38 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.34 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.22 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 nmol/mol', conversion factor 0.501. QA variability from '0.28 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 nmol/mol', conversion factor 0.501." />
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    <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_max" shape="qc_ozone_nmol_per_mol_max_flags time" type="int">
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  <variable name="meta_ozone_nmol_per_mol_max" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="v_ozone_ug_per_m3_max" shape="time" type="double">
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    <attribute name="standard_name" value="mass_concentration_of_ozone_in_air" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_statistics" value="maximum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
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    <attribute name="ebas_station_latitude" type="double" value="39.984" />
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    <attribute name="ebas_regime" value="IMG" />
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    <attribute name="ebas_laboratory_code" value="US17L" />
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    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
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    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ozonemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ozone mass concentration" />
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  <variable name="qc_ozone_ug_per_m3_max" shape="qc_ozone_ug_per_m3_max_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <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" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-06-08T09:18:43.384922Z" />
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    <attribute name="ebas_regime" value="IMG" />
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    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
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    <attribute name="ebas_inlet_tube_length" value="7.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_qa1_variability" value="0.2 nmol/mol" />
    <attribute name="ebas_qa2_variability" value="0.2 nmol/mol" />
    <attribute name="ebas_qa3_variability" value="0.1 nmol/mol" />
    <attribute name="ebas_qa4_variability" value="0.1 nmol/mol" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="&quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;&quot;Independent&quot;&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
    <attribute name="ebas_submitter" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953. -- Data converted on export from EBAS from 'ug/m3' at 293.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 0.501. Detection limit converted from '2.0 ug/m3' at 293.15 K, 1013.25 hPa to '1.0 nmol/mol', conversion factor 0.501. QA variability from '0.38 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.34 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.22 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 nmol/mol', conversion factor 0.501. QA variability from '0.28 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 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="" />
    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ozone_nmol_per_mol_min" shape="qc_ozone_nmol_per_mol_min_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_nmol_per_mol_min" 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_min" 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_min meta_ozone_ug_per_m3_min" />
    <attribute name="cell_methods" value="time: minimum" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-06-08T09:18:43.384922Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="minimum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0106R" />
    <attribute name="ebas_platform_code" value="US0106S" />
    <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="39.984" />
    <attribute name="ebas_station_longitude" type="double" value="-105.036" />
    <attribute name="ebas_station_altitude" value="1607.0 m" />
    <attribute name="ebas_measurement_height" value="5.1 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="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C15_BSE" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49CPS-55502-304" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="7.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_qa1_variability" value="0.38 ug/m3" />
    <attribute name="ebas_qa2_variability" value="0.34 ug/m3" />
    <attribute name="ebas_qa3_variability" value="0.22 ug/m3" />
    <attribute name="ebas_qa4_variability" value="0.28 ug/m3" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
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    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="&quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;&quot;Independent&quot;&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
    <attribute name="ebas_submitter" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/ozonemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="ozone mass concentration" />
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    <attribute name="actris_matrix_preferred_term" value="gas phase" />
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    <attribute name="actris_framework_uri" value="" />
    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ozone_ug_per_m3_min" shape="qc_ozone_ug_per_m3_min_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ozone_ug_per_m3_min" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="v_ozone_nmol_per_mol_stddev" 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_stddev meta_ozone_nmol_per_mol_stddev" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-06-08T09:18:43.384922Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0106R" />
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    <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" type="double" value="39.984" />
    <attribute name="ebas_station_longitude" type="double" value="-105.036" />
    <attribute name="ebas_station_altitude" value="1607.0 m" />
    <attribute name="ebas_measurement_height" value="5.1 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="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C15_BSE" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49CPS-55502-304" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_flow_rate" value="1.3 l/min" />
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    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
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    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
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    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="&quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;&quot;Independent&quot;&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
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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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953. -- Data converted on export from EBAS from 'ug/m3' at 293.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 0.501. Detection limit converted from '2.0 ug/m3' at 293.15 K, 1013.25 hPa to '1.0 nmol/mol', conversion factor 0.501. QA variability from '0.38 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.34 ug/m3' at 293.15 K, 1013.25 hPa to '0.2 nmol/mol', conversion factor 0.501. QA variability from '0.22 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 nmol/mol', conversion factor 0.501. QA variability from '0.28 ug/m3' at 293.15 K, 1013.25 hPa to '0.1 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" />
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    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
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  <variable name="qc_ozone_nmol_per_mol_stddev" shape="qc_ozone_nmol_per_mol_stddev_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="meta_ozone_nmol_per_mol_stddev" 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_stddev" 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" />
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    <attribute name="ancillary_variables" value="qc_ozone_ug_per_m3_stddev meta_ozone_ug_per_m3_stddev" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="2026-06-08T09:18:43.384922Z" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0106R" />
    <attribute name="ebas_platform_code" value="US0106S" />
    <attribute name="ebas_station_name" value="Broomfield Soaring Eagle Park" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Residential" />
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    <attribute name="ebas_station_latitude" type="double" value="39.984" />
    <attribute name="ebas_station_longitude" type="double" value="-105.036" />
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    <attribute name="ebas_measurement_height" value="5.1 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
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    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C15_BSE" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
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    <attribute name="ebas_instrument_serial_number" value="49CPS-55502-304" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_flow_rate" value="1.3 l/min" />
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    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_zero_negative_values" value="Values (1-minute) below detection limit reported as half the detection limit" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_qa1_variability" value="0.38 ug/m3" />
    <attribute name="ebas_qa2_variability" value="0.34 ug/m3" />
    <attribute name="ebas_qa3_variability" value="0.22 ug/m3" />
    <attribute name="ebas_qa4_variability" value="0.28 ug/m3" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="&quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;&quot;Independent&quot;&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;" />
    <attribute name="ebas_submitter" value="&quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&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 framework: Independent. The monitoring program was funded and the data were made publicly available by the City and County of Broomfield, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
    <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="" />
    <attribute name="actris_framework_preferred_term" value="" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_ozone_ug_per_m3_stddev" shape="qc_ozone_ug_per_m3_stddev_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_stddev" 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>
