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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ammonia at Gonfreville l'Orcher" />
  <attribute name="keywords" value="air, mass_concentration_of_ammonia_expressed_as_nitrogen_in_air, Gonfreville l'Orcher, RI-URBANS, ammonia, FR0050U, mole_fraction_of_ammonia_in_air" />
  <attribute name="id" value="6NNX-4886.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="RI-URBANS" />
  <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 framework: RI-URBANS. Request acknowledgement details from data originator" />
  <attribute name="doi" value="https://doi.org/10.48597/6NNX-4886" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Legrand, C., 2023, Ammonia at Gonfreville l'Orcher, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/6NNX-4886" />
  <attribute name="summary" value="Ammonia at Gonfreville l'Orcher. These measurements are gathered as a part of the following projects RI-URBANS and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ammonia in air (mole_fraction_of_ammonia_in_air), ammonia in air (mass_concentration_of_ammonia_expressed_as_nitrogen_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="FR26L, Atmo Normandie, 3 place de la pomme d'or, 76000, Rouen, France" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2023-11-08T00:00:00 UTC" />
  <attribute name="date_metadata_modified" value="2023-11-08T00:00:00 UTC" />
  <attribute name="creator_name" value="Christophe Legrand" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="christophe.legrand@atmonormandie.fr" />
  <attribute name="creator_institution" value="Atmo Normandie" />
  <attribute name="contributor_name" value="Marvin Dufresne" />
  <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 (49.502635 0.23269 72.0)" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="geospatial_lat_min" type="double" value="49.502635" />
  <attribute name="geospatial_lat_max" type="double" value="49.502635" />
  <attribute name="geospatial_lon_min" type="double" value="0.23269" />
  <attribute name="geospatial_lon_max" type="double" value="0.23269" />
  <attribute name="geospatial_vertical_min" type="double" value="72.0" />
  <attribute name="geospatial_vertical_max" type="double" value="72.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="time_coverage_start" value="2020-07-09T00:00:00 UTC" />
  <attribute name="time_coverage_end" value="2023-08-21T04:00:00 UTC" />
  <attribute name="time_coverage_duration" value="P0003-01-12T04:00:00" />
  <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="Legrand, C., 2023, Ammonia at Gonfreville l'Orcher, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/6NNX-4886" />
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  <attribute name="ebas_timezone" value="UTC" />
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  <attribute name="ebas_file_creation" value="2024-02-26T13:45:14.086842 UTC" />
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  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="initial revision, manually inspected" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="3y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_station_code" value="FR0050U" />
  <attribute name="ebas_platform_code" value="FR0050S" />
  <attribute name="ebas_station_name" value="Gonfreville l'Orcher" />
  <attribute name="ebas_station_land_use" value="Residential" />
  <attribute name="ebas_station_setting" value="Urban and center city" />
  <attribute name="ebas_station_latitude" value="49.502635" />
  <attribute name="ebas_station_longitude" value="0.23269" />
  <attribute name="ebas_station_altitude" value="72.0 m" />
  <attribute name="ebas_measurement_height" value="3.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="ammonia" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="FR26L" />
  <attribute name="ebas_instrument_type" value="online_crds" />
  <attribute name="ebas_instrument_name" value="NH3_Gonfreville" />
  <attribute name="ebas_method_ref" value="FR26L_NH3_Gonfreville" />
  <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="FR26L, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France" />
  <attribute name="ebas_framework_acronym" value="RI-URBANS" />
  <attribute name="ebas_framework_name" value="RI-URBANS" />
  <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="Legrand, Christophe, christophe.legrand@atmonormandie.fr, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France" />
  <attribute name="ebas_submitter" value="Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France" />
  <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: RI-URBANS. 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;Legrand, C., 2023, Ammonia at Gonfreville l'Orcher, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/6NNX-4886&quot;,&#xA;    &quot;Set type code&quot;: &quot;TU&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;6NNX-4886.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/6NNX-4886&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/6NNX-4886&quot;,&#xA;    &quot;File creation&quot;: &quot;2024-02-26T13:45:14.086842 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2023-11-13T11:36:49.100497 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20200709000000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20231108000000&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;initial revision, manually inspected&quot;,&#xA;    &quot;Statistics&quot;: &quot;arithmetic mean&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;3y&quot;,&#xA;    &quot;Resolution code&quot;: &quot;1h&quot;,&#xA;    &quot;Sample duration&quot;: &quot;1h&quot;,&#xA;    &quot;Station code&quot;: &quot;FR0050U&quot;,&#xA;    &quot;Platform code&quot;: &quot;FR0050S&quot;,&#xA;    &quot;Station name&quot;: &quot;Gonfreville l'Orcher&quot;,&#xA;    &quot;Station land use&quot;: &quot;Residential&quot;,&#xA;    &quot;Station setting&quot;: &quot;Urban and center city&quot;,&#xA;    &quot;Station latitude&quot;: &quot;49.502635&quot;,&#xA;    &quot;Station longitude&quot;: &quot;0.23269&quot;,&#xA;    &quot;Station altitude&quot;: &quot;72.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;3.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Component&quot;: &quot;ammonia&quot;,&#xA;    &quot;Matrix&quot;: &quot;air&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;FR26L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;online_crds&quot;,&#xA;    &quot;Instrument name&quot;: &quot;NH3_Gonfreville&quot;,&#xA;    &quot;Method ref&quot;: &quot;FR26L_NH3_Gonfreville&quot;,&#xA;    &quot;Zero/negative values code&quot;: &quot;Zero/negative possible&quot;,&#xA;    &quot;Zero/negative values&quot;: &quot;Zero and neg. values may appear due to statistical variations at very low concentrations&quot;,&#xA;    &quot;Organization&quot;: &quot;FR26L, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;RI-URBANS&quot;,&#xA;    &quot;Framework name&quot;: &quot;RI-URBANS&quot;,&#xA;    &quot;Framework contact name&quot;: &quot;Markus Fiebig&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;Markus.Fiebig@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Legrand, Christophe, christophe.legrand@atmonormandie.fr, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France&quot;,&#xA;    &quot;Submitter&quot;: &quot;Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France&quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;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: RI-URBANS. 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" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="27316" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="ammonia_nmol_per_mol_qc_flags" length="1" />
  <dimension name="ammonia_ug_N_per_m3_qc_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2020-07-09T00:30:00Z" />
    <attribute name="time_coverage_end" value="2023-08-21T03:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3600.0" />
    <attribute name="time_coverage_duration" value="P0Y0M1138DT3H0M0.000S" />
  </group>
  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-04-12" />
    <attribute name="nciso_version" value="2.4.7" />
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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="ammonia_nmol_per_mol" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ammonia_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="ammonia_nmol_per_mol_qc ammonia_nmol_per_mol_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="20231108000000" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_station_code" value="FR0050U" />
    <attribute name="ebas_platform_code" value="FR0050S" />
    <attribute name="ebas_station_name" value="Gonfreville l'Orcher" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Urban and center city" />
    <attribute name="ebas_station_latitude" value="49.502635" />
    <attribute name="ebas_station_longitude" value="0.23269" />
    <attribute name="ebas_station_altitude" value="72.0 m" />
    <attribute name="ebas_measurement_height" value="3.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ammonia" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FR26L" />
    <attribute name="ebas_instrument_type" value="online_crds" />
    <attribute name="ebas_instrument_name" value="NH3_Gonfreville" />
    <attribute name="ebas_method_ref" value="FR26L_NH3_Gonfreville" />
    <attribute name="ebas_detection_limit" value="0.03 nmol/mol" />
    <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="FR26L, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France" />
    <attribute name="ebas_framework_acronym" value="RI-URBANS" />
    <attribute name="ebas_framework_name" value="RI-URBANS" />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Legrand, Christophe, christophe.legrand@atmonormandie.fr, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France" />
    <attribute name="ebas_submitter" value="Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France" />
    <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: RI-URBANS. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492. Detection limit converted from '0.03 nmol/mol' to '0.019 ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492. -- Data converted on export from EBAS from 'ug N/m3' at 273.15 K, 1013.25 hPa to 'nmol/mol', conversion factor 1.6002. Detection limit converted from '0.019 ug N/m3' at 273.15 K, 1013.25 hPa to '0.03 nmol/mol', conversion factor 1.6002." />
  </variable>
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    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ammonia_ug_N_per_m3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ammonia_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="ammonia_ug N_per_m3_qc ammonia_ug N_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="20231108000000" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision, manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_station_code" value="FR0050U" />
    <attribute name="ebas_platform_code" value="FR0050S" />
    <attribute name="ebas_station_name" value="Gonfreville l'Orcher" />
    <attribute name="ebas_station_land_use" value="Residential" />
    <attribute name="ebas_station_setting" value="Urban and center city" />
    <attribute name="ebas_station_latitude" value="49.502635" />
    <attribute name="ebas_station_longitude" value="0.23269" />
    <attribute name="ebas_station_altitude" value="72.0 m" />
    <attribute name="ebas_measurement_height" value="3.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ammonia" />
    <attribute name="ebas_unit" value="ug N/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="FR26L" />
    <attribute name="ebas_instrument_type" value="online_crds" />
    <attribute name="ebas_instrument_name" value="NH3_Gonfreville" />
    <attribute name="ebas_method_ref" value="FR26L_NH3_Gonfreville" />
    <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" value="0.019 ug N/m3" />
    <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="FR26L, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France" />
    <attribute name="ebas_framework_acronym" value="RI-URBANS" />
    <attribute name="ebas_framework_name" value="RI-URBANS" />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Legrand, Christophe, christophe.legrand@atmonormandie.fr, Atmo Normandie, , , 3 place de la pomme d'or, , 76000, Rouen, France" />
    <attribute name="ebas_submitter" value="Dufresne, Marvin, marvin.dufresne@imt-nord-europe.fr, Institut Mine Telecom Nord Europe, IMT NE, CERI EE, 941 rue Charles Bourseul, , 59500, Douai, France" />
    <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: RI-URBANS. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Data converted on import into EBAS from 'nmol/mol' to 'ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492. Detection limit converted from '0.03 nmol/mol' to '0.019 ug N/m3' at 273.15 K, 1013.25 hPa, conversion factor 0.62492." />
  </variable>
  <variable name="ammonia_ug_N_per_m3_qc" shape="ammonia_ug_N_per_m3_qc_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="ammonia_ug_N_per_m3_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="time" shape="time" type="double">
    <attribute name="long_name" value="time of measurement" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="metadata_time" shape="metadata_time" type="double">
    <attribute name="long_name" value="time of ebas metadata intervals" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
</netcdf>
