<?xml version="1.0" encoding="UTF-8"?>
<gmd:MD_Metadata xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xmlns:gco="http://www.isotc211.org/2005/gco"
                 xmlns:gmd="http://www.isotc211.org/2005/gmd"
                 xmlns:srv="http://www.isotc211.org/2005/srv"
                 xmlns:gmx="http://www.isotc211.org/2005/gmx"
                 xmlns:gts="http://www.isotc211.org/2005/gts"
                 xmlns:gsr="http://www.isotc211.org/2005/gsr"
                 xmlns:gmi="http://www.isotc211.org/2005/gmi"
                 xmlns:gml="http://www.opengis.net/gml"
                 xmlns:xlink="http://www.w3.org/1999/xlink"
                 xsi:schemaLocation="http://www.isotc211.org/2005/gmd http://www.isotc211.org/2005/gmx/gmx.xsd">
   <gmd:fileIdentifier>
      <gco:CharacterString>edu.ucar.opensky::articles:23120</gco:CharacterString>
   </gmd:fileIdentifier>
   <gmd:language>
      <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/"
                        codeListValue="eng; USA"/>
   </gmd:language>
   <gmd:characterSet>
      <gmd:MD_CharacterSetCode codeListValue="utf8"
                               codeList="http://www.isotc211.org/namespace/resources/codeList.xml#MD_CharacterSetCode"/>
   </gmd:characterSet>
   <gmd:hierarchyLevel>
      <gmd:MD_ScopeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#MD_ScopeCode"
                        codeListValue="document"/>
   </gmd:hierarchyLevel>
   <gmd:contact>
      <gmd:CI_ResponsibleParty>
         <gmd:organisationName>
            <gco:CharacterString>UCAR/NCAR - Library</gco:CharacterString>
         </gmd:organisationName>
         <gmd:positionName>
            <gco:CharacterString>OpenSky Support</gco:CharacterString>
         </gmd:positionName>
         <gmd:contactInfo>
            <gmd:CI_Contact>
               <gmd:address>
                  <gmd:CI_Address>
                     <gmd:deliveryPoint>
                        <gco:CharacterString>PO Box 3000</gco:CharacterString>
                     </gmd:deliveryPoint>
                     <gmd:city>
                        <gco:CharacterString>Boulder</gco:CharacterString>
                     </gmd:city>
                     <gmd:administrativeArea>
                        <gco:CharacterString>CO</gco:CharacterString>
                     </gmd:administrativeArea>
                     <gmd:postalCode>
                        <gco:CharacterString>80307-3000</gco:CharacterString>
                     </gmd:postalCode>
                     <gmd:electronicMailAddress>
                        <gco:CharacterString>opensky@ucar.edu</gco:CharacterString>
                     </gmd:electronicMailAddress>
                  </gmd:CI_Address>
               </gmd:address>
               <gmd:onlineResource>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>http://opensky.ucar.edu/</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>homepage</gco:CharacterString>
                     </gmd:name>
                  </gmd:CI_OnlineResource>
               </gmd:onlineResource>
            </gmd:CI_Contact>
         </gmd:contactInfo>
         <gmd:role>
            <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode>
         </gmd:role>
      </gmd:CI_ResponsibleParty>
   </gmd:contact>
   <gmd:dateStamp>
      <gco:DateTime>2025-12-25T15:17:22.430937</gco:DateTime>
   </gmd:dateStamp>
   <gmd:metadataStandardName>
      <gco:CharacterString>ISO 19115-2 Geographic Information - Metadata - Part 2:
                    Extensions for Imagery and Gridded Data</gco:CharacterString>
   </gmd:metadataStandardName>
   <gmd:metadataStandardVersion>
      <gco:CharacterString>ISO 19115-2:2009(E)</gco:CharacterString>
   </gmd:metadataStandardVersion>
   <gmd:dataSetURI>
      <gco:CharacterString>https://n2t.org/ark:/85065/d70k2cr5</gco:CharacterString>
   </gmd:dataSetURI>
   <gmd:identificationInfo>
      <gmd:MD_DataIdentification>
         <gmd:citation>
            <gmd:CI_Citation>
               <gmd:title>
                  <gco:CharacterString>Air quality in the Northern Colorado Front Range Metro Area: The Front Range Air Pollution and Photochemistry Ãxperiment (FRAPPÃ)</gco:CharacterString>
               </gmd:title>
               <gmd:date>
                  <gmd:CI_Date>
                     <gmd:date>
                        <gco:DateTime>2020-01-27T00:00:00Z</gco:DateTime>
                     </gmd:date>
                     <gmd:dateType>
                        <gmd:CI_DateTypeCode codeList="codeListLocation#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>
                     </gmd:dateType>
                  </gmd:CI_Date>
               </gmd:date>
               <gmd:identifier>
                  <gmd:RS_Identifier>
                     <gmd:code>
                        <gco:CharacterString>https://n2t.org/ark:/85065/d70k2cr5</gco:CharacterString>
                     </gmd:code>
                  </gmd:RS_Identifier>
               </gmd:identifier>
               <gmd:identifier>
                  <gmd:RS_Identifier>
                     <gmd:code>
                        <gco:CharacterString>https://doi.org/10.1029/2019JD031197</gco:CharacterString>
                     </gmd:code>
                  </gmd:RS_Identifier>
               </gmd:identifier>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gmx:Anchor xlink:href="https://orcid.org/0000-0002-2661-6394"
                                    xlink:title="Flocke, Frank M."
                                    xlink:actuate="onRequest">Flocke, Frank M.</gmx:Anchor>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gmx:Anchor xlink:href="https://orcid.org/0000-0002-9177-1315"
                                    xlink:title="Pfister, Gabriele"
                                    xlink:actuate="onRequest">Pfister, Gabriele</gmx:Anchor>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gco:CharacterString>Crawford, J. H.</gco:CharacterString>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gco:CharacterString>Pickering, K. E.</gco:CharacterString>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gco:CharacterString>Pierce, G.</gco:CharacterString>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gco:CharacterString>Bon, D.</gco:CharacterString>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:individualName>
                        <gco:CharacterString>Reddy, P.</gco:CharacterString>
                     </gmd:individualName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="author">author</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
               <gmd:citedResponsibleParty>
                  <gmd:CI_ResponsibleParty>
                     <gmd:organisationName>
                        <gco:CharacterString>UCAR/NCAR - Library</gco:CharacterString>
                     </gmd:organisationName>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="publisher">publisher</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:citedResponsibleParty>
            </gmd:CI_Citation>
         </gmd:citation>
         <gmd:abstract>
            <gco:CharacterString>We describe the resources used, the deployment strategy, and the outcomes of the Front Range Air Pollution and Photochemistry Ãxperiment (FRAPPÃ) experiment, which took place in the summer of 2014 in the Front Range of Colorado. We provide a history of air quality of the region and the outcomes of previously conducted experiments, describe the atmospheric conditions encountered during the campaign, and summarize the scientific findings that the campaign produced, together with the Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) intensive, simultaneously carried out by the National Aeronautics and Space Administration. The goal of FRAPPÃ was to measure emission tracers and photochemical tracers from the ground and by aircraft to be able to quantify the contributions of various emission sectors to the photochemical production of ozone in the Colorado Front Range. We found major contributions from the fossil fuel extraction sector as well as the transportation sector, with minor contributions from agriculture, energy generation, and industry. The meteorological conditions were also found to be critical in creating situations conducive to high ozone in the area.</gco:CharacterString>
         </gmd:abstract>
         <gmd:pointOfContact>
            <gmd:CI_ResponsibleParty>
               <gmd:organisationName>
                  <gco:CharacterString>UCAR/NCAR - Library</gco:CharacterString>
               </gmd:organisationName>
               <gmd:positionName>
                  <gco:CharacterString>OpenSky Support</gco:CharacterString>
               </gmd:positionName>
               <gmd:contactInfo>
                  <gmd:CI_Contact>
                     <gmd:address>
                        <gmd:CI_Address>
                           <gmd:deliveryPoint>
                              <gco:CharacterString>PO Box 3000</gco:CharacterString>
                           </gmd:deliveryPoint>
                           <gmd:city>
                              <gco:CharacterString>Boulder</gco:CharacterString>
                           </gmd:city>
                           <gmd:administrativeArea>
                              <gco:CharacterString>CO</gco:CharacterString>
                           </gmd:administrativeArea>
                           <gmd:postalCode>
                              <gco:CharacterString>80307-3000</gco:CharacterString>
                           </gmd:postalCode>
                           <gmd:electronicMailAddress>
                              <gco:CharacterString>opensky@ucar.edu</gco:CharacterString>
                           </gmd:electronicMailAddress>
                        </gmd:CI_Address>
                     </gmd:address>
                     <gmd:onlineResource>
                        <gmd:CI_OnlineResource>
                           <gmd:linkage>
                              <gmd:URL>http://opensky.ucar.edu/</gmd:URL>
                           </gmd:linkage>
                           <gmd:name>
                              <gco:CharacterString>homepage</gco:CharacterString>
                           </gmd:name>
                        </gmd:CI_OnlineResource>
                     </gmd:onlineResource>
                  </gmd:CI_Contact>
               </gmd:contactInfo>
               <gmd:role>
                  <gmd:CI_RoleCode codeList="codeListLocation#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode>
               </gmd:role>
            </gmd:CI_ResponsibleParty>
         </gmd:pointOfContact>
         <gmd:resourceFormat>
            <gmd:MD_Format>
               <gmd:name>
                  <gco:CharacterString>PDF</gco:CharacterString>
               </gmd:name>
               <gmd:version/>
            </gmd:MD_Format>
         </gmd:resourceFormat>
         <gmd:descriptiveKeywords>
            <gmd:MD_Keywords>
               <gmd:keyword>
                  <gco:CharacterString>Text</gco:CharacterString>
               </gmd:keyword>
               <gmd:type>
                  <gmd:MD_KeywordTypeCode codeList="codeListLocation#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
               </gmd:type>
               <gmd:thesaurusName>
                  <gmd:CI_Citation>
                     <gmd:title>
                        <gco:CharacterString>Resource Type</gco:CharacterString>
                     </gmd:title>
                     <gmd:date>
                        <gmd:CI_Date>
                           <gmd:date>
                              <gco:DateTime>2016-01-01T00:00:00Z</gco:DateTime>
                           </gmd:date>
                           <gmd:dateType>
                              <gmd:CI_DateTypeCode codeList="codeListLocation#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>
                           </gmd:dateType>
                        </gmd:CI_Date>
                     </gmd:date>
                  </gmd:CI_Citation>
               </gmd:thesaurusName>
            </gmd:MD_Keywords>
         </gmd:descriptiveKeywords>
         <gmd:resourceConstraints>
            <gmd:MD_LegalConstraints>
               <gmd:useLimitation>
                  <gco:CharacterString>Copyright 2020 American Geophysical Union.</gco:CharacterString>
               </gmd:useLimitation>
               <gmd:otherConstraints>
                  <gco:CharacterString>None</gco:CharacterString>
               </gmd:otherConstraints>
            </gmd:MD_LegalConstraints>
         </gmd:resourceConstraints>
         <gmd:language>
            <gmd:LanguageCode codeList="codeListLocation#LanguageCode" codeListValue="eng">eng</gmd:LanguageCode>
         </gmd:language>
         <gmd:topicCategory>
            <gmd:MD_TopicCategoryCode>geoscientificInformation</gmd:MD_TopicCategoryCode>
         </gmd:topicCategory>
      </gmd:MD_DataIdentification>
   </gmd:identificationInfo>
</gmd:MD_Metadata>
