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  <attribute name="title" value="Nitrogen oxides at Monte Cimone" />
  <attribute name="summary" value="Nitrogen oxides at Monte Cimone. These measurements are gathered as a part of the following projects ACTRIS, EMEP, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['NOx in air (mole_fraction_of_nox_in_air)', 'NOx in air (mass_concentration_of_nox_expressed_as_nitrogen_in_air)', 'nitrogen_dioxide in air (mole_fraction_of_nitrogen_dioxide_in_air)', 'nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air)', 'nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air)', 'nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air)']" />
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  <attribute name="project" value="ACTRIS, 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: ACTRIS, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
  <attribute name="doi" value="https://doi.org/10.48597/P6HK-KD8Z" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Putero, D., Cristofanelli, P., Calzolari, F., Busetto, M., ACTRIS, EMEP, GAW-WDCRG, 2026, Nitrogen oxides at Monte Cimone, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/P6HK-KD8Z" />
  <attribute name="source" value="surface observation" />
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  <attribute name="date_created" value="2026-07-01T13:46:52.970000Z" />
  <attribute name="date_metadata_modified" value="2026-07-01T13:46:52Z" />
  <attribute name="creator_name" value="Davide Putero, Paolo Cristofanelli, Francescopiero Calzolari, Maurizio Busetto" />
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  <attribute name="contributor_name" value="Davide Putero" />
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  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
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  <attribute name="time_coverage_start" value="2023-08-01T14:00:00Z" />
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  <attribute name="ebas_version_description" value="initial revision, manually inspected" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="29mo" />
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  <attribute name="ebas_instrument_model" value="T200UP" />
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  <attribute name="ebas_inlet_tube_material" value="Teflon" />
  <attribute name="ebas_ozone_correction" value="Not corrected for reaction with O3 in the inlet" />
  <attribute name="ebas_water_vapor_correction" value="Not corrected for water vapor quenching in CLD" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_detection_limit_expl" value="Determined by zero noise" />
  <attribute name="ebas_measurement_uncertainty_expl" value="Includes statistical uncertainty of individual sample and calibration uncertainty" />
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  <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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  <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCRG" />
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  <attribute name="ebas_framework_contact_name" value="Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, kt@nilu.no" />
  <attribute name="ebas_originator" value="&quot;Putero, Davide, d.putero@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, , Via P. Gobetti 101, , I-40129, Bologna, Italy&quot;, &quot;Cristofanelli, Paolo, p.cristofanelli@isac.cnr.it, National Research Council of Italy, CNR, Institute for Atmospheric and Climate Science, Via Gobetti 101, , I-4019, Bologna, Italy&quot;, &quot;Calzolari, Francescopiero, f.calzolari@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, Institute for Atmospheric and Climate Science, Via P. Gobetti 101, , I-40129, Bologna, Italy, ORCID=0000-0003-4535-9626&quot;, &quot;Busetto, Maurizio, m.busetto@isac.cnr.it, National Research Council of Italy, CNR, Institute for Atmospheric and Climate Science, Via Gobetti 101, I-4019, , Bologna, Italy&quot;" />
  <attribute name="ebas_submitter" value="&quot;Putero, Davide, d.putero@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, , Via P. Gobetti 101, , I-40129, Bologna, Italy&quot;" />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="units" value="nmol/mol" />
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    <attribute name="ebas_measurement_height" value="7.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="nmol/mol" />
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    <attribute name="ebas_inlet_tube_material" value="Teflon" />
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    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_submitter" value="&quot;Putero, Davide, d.putero@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, , Via P. Gobetti 101, , I-40129, Bologna, Italy&quot;" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitrogendioxideamountfraction" />
    <attribute name="actris_variable_preferred_term" value="nitrogen dioxide amount fraction" />
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    <attribute name="_FillValue" type="int" value="0" />
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  <variable name="meta_nitrogen_dioxide_nmol_per_mol_perc8413" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="qc_nitrogen_dioxide_ug_N_per_m3_perc8413 meta_nitrogen_dioxide_ug_N_per_m3_perc8413" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <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="IT0009R" />
    <attribute name="ebas_platform_code" value="IT0009S" />
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    <attribute name="ebas_station_gaw_type" value="G" />
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    <attribute name="ebas_measurement_height" value="7.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="nitrogen_dioxide" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
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    <attribute name="ebas_humidity_temperaure_control" value="None" />
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    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
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    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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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_nitrogen_dioxide_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="actris_variable_preferred_term" value="nitrogen dioxide amount fraction" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
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    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="273.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit_expl" value="Determined by zero noise" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Includes statistical uncertainty of individual sample and calibration uncertainty" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="IT06L, Institute of Atmospheric Sciences and Climate, CNR-ISAC, Section of Bologna, Via Gobetti 101, , 40129, Bologna, Italy" />
    <attribute name="ebas_framework_acronym" value="ACTRIS, EMEP, GAW-WDCRG" />
    <attribute name="ebas_framework_name" value="&quot;European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases&quot;, European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases" />
    <attribute name="ebas_framework_description" value="&quot;ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.&quot;, 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="Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="clm@nilu.no, kt@nilu.no, kt@nilu.no" />
    <attribute name="ebas_originator" value="&quot;Putero, Davide, d.putero@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, , Via P. Gobetti 101, , I-40129, Bologna, Italy&quot;, &quot;Cristofanelli, Paolo, p.cristofanelli@isac.cnr.it, National Research Council of Italy, CNR, Institute for Atmospheric and Climate Science, Via Gobetti 101, , I-4019, Bologna, Italy&quot;, &quot;Calzolari, Francescopiero, f.calzolari@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, Institute for Atmospheric and Climate Science, Via P. Gobetti 101, , I-40129, Bologna, Italy, ORCID=0000-0003-4535-9626&quot;, &quot;Busetto, Maurizio, m.busetto@isac.cnr.it, National Research Council of Italy, CNR, Institute for Atmospheric and Climate Science, Via Gobetti 101, I-4019, , Bologna, Italy&quot;" />
    <attribute name="ebas_submitter" value="&quot;Putero, Davide, d.putero@isac.cnr.it, Institute of Atmospheric Sciences and Climate, ISAC, , Via P. Gobetti 101, , I-40129, Bologna, Italy&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: ACTRIS, EMEP, GAW-WDCRG. Request acknowledgement details from data originator" />
    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="nitric oxide 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_constraints_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen" />
    <attribute name="actris_constraints_preferred_term" value="expressed as nitrogen" />
    <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/chemiluminescencedetector-photolyticalconverter" />
    <attribute name="actris_instrument_type_preferred_term" value="chemiluminescence detector, photolytical converter" />
    <attribute name="actris_framework_uri" value="https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, 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="ACTRIS, EMEP, GAW-WDCRG" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
  </variable>
  <variable name="qc_nitrogen_monoxide_ug_N_per_m3_stddev" shape="qc_nitrogen_monoxide_ug_N_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_nitrogen_monoxide_ug_N_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>
