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This data set includes 12 files, each of them corresponding to one output time near the middle of each month of Year 1997 (12 Jan, 11 Feb, 13 Mar, 12 Apr, 12 May, 11 Jun, 11 Jul, 10 Aug, 19 Sept, 19 Oct, 18 Nov, 18 Dec). Each file contains the calculated 3-D distribution of 37 chemical species or families and 6 meteorological variables. The model used is the SLIMCAT chemistry transport model (CTM). The model was run from October 1991 and forced by the UK Met Office analyses. The model used 18 isentropic levels. The vertical coordinate in the data files is the globally averaged altitude. The real lat/lon-dependent altitude is given in the ALT field recorded in the files. The THETA field gives the real model theta levels (which are constant with latitude/longitude).

Data from Martyn Chipperfield, University of Leeds. NERC Research Programme UTLS-Ozone (Upper Troposphere and Lower Stratosphere) and National Centre for Earth Observation (NCEO).

A newer version 2 dataset was produced in 2009 that supersedes this dataset.</gco:CharacterString>
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                  <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/noLimitations">Public data: access to these data is available to both registered and non-registered users.</gmx:Anchor>
               </gmd:otherConstraints>
            </gmd:MD_LegalConstraints>
         </gmd:resourceConstraints>
         <gmd:resourceConstraints>
            <gmd:MD_LegalConstraints>
               <gmd:useConstraints>
                  <gmd:MD_RestrictionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_RestrictionCode"
                                          codeListValue="otherRestrictions">otherRestrictions</gmd:MD_RestrictionCode>
               </gmd:useConstraints>
               <gmd:otherConstraints>
                  <gmx:Anchor xlink:title="Licence file link."
                              xlink:href="http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/">Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.</gmx:Anchor>
               </gmd:otherConstraints>
            </gmd:MD_LegalConstraints>
         </gmd:resourceConstraints>
         <gmd:spatialRepresentationType>
            <gmd:MD_SpatialRepresentationTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_SpatialRepresentationTypeCode"
                                                  codeListValue="grid">grid</gmd:MD_SpatialRepresentationTypeCode>
         </gmd:spatialRepresentationType>
         <gmd:spatialResolution>
            <gmd:MD_Resolution>
               <gmd:distance gco:nilReason="inapplicable"/>
            </gmd:MD_Resolution>
         </gmd:spatialResolution>
         <gmd:language>
            <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/php/code_list.php"
                              codeListValue="eng">English</gmd:LanguageCode>
         </gmd:language>
         <gmd:topicCategory>
            <gmd:MD_TopicCategoryCode>climatologyMeteorologyAtmosphere</gmd:MD_TopicCategoryCode>
         </gmd:topicCategory>
         <gmd:extent>
            <gmd:EX_Extent>
               <gmd:geographicElement>
                  <gmd:EX_GeographicBoundingBox>
                     <gmd:westBoundLongitude>
                        <gco:Decimal>-180.0</gco:Decimal>
                     </gmd:westBoundLongitude>
                     <gmd:eastBoundLongitude>
                        <gco:Decimal>180.0</gco:Decimal>
                     </gmd:eastBoundLongitude>
                     <gmd:southBoundLatitude>
                        <gco:Decimal>-87.5</gco:Decimal>
                     </gmd:southBoundLatitude>
                     <gmd:northBoundLatitude>
                        <gco:Decimal>87.5</gco:Decimal>
                     </gmd:northBoundLatitude>
                  </gmd:EX_GeographicBoundingBox>
               </gmd:geographicElement>
            </gmd:EX_Extent>
         </gmd:extent>
         <gmd:extent>
            <gmd:EX_Extent>
               <gmd:temporalElement>
                  <gmd:EX_TemporalExtent>
                     <gmd:extent>
                        <gml:TimePeriod gml:id="CEDA01">
                           <gml:beginPosition>1997-01-01T00:00:00</gml:beginPosition>
                           <gml:endPosition>1997-12-31T00:00:00</gml:endPosition>
                        </gml:TimePeriod>
                     </gmd:extent>
                  </gmd:EX_TemporalExtent>
               </gmd:temporalElement>
            </gmd:EX_Extent>
         </gmd:extent>
      </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:distributionInfo>
      <gmd:MD_Distribution>
         <gmd:distributionFormat>
            <gmd:MD_Format>
               <gmd:name>
                  <gco:CharacterString>Data are netCDF formatted.</gco:CharacterString>
               </gmd:name>
               <gmd:version gco:nilReason="unknown"/>
            </gmd:MD_Format>
         </gmd:distributionFormat>
         <gmd:distributor>
            <gmd:MD_Distributor>
               <gmd:distributorContact>
                  <gmd:CI_ResponsibleParty>
                     <gmd:organisationName>
                        <gco:CharacterString>NCAS British Atmospheric Data Centre (NCAS BADC)</gco:CharacterString>
                     </gmd:organisationName>
                     <gmd:positionName>
                        <gco:CharacterString>Data Center Contact</gco:CharacterString>
                     </gmd:positionName>
                     <gmd:contactInfo>
                        <gmd:CI_Contact>
                           <gmd:phone>
                              <gmd:CI_Telephone>
                                 <gmd:voice>
                                    <gco:CharacterString>+44(0)1235 446432</gco:CharacterString>
                                 </gmd:voice>
                              </gmd:CI_Telephone>
                           </gmd:phone>
                           <gmd:address>
                              <gmd:CI_Address>
                                 <gmd:deliveryPoint>
                                    <gco:CharacterString>British Atmospheric Data Centre</gco:CharacterString>
                                 </gmd:deliveryPoint>
                                 <gmd:deliveryPoint>
                                    <gco:CharacterString>STFC Rutherford Appleton Laboratory</gco:CharacterString>
                                 </gmd:deliveryPoint>
                                 <gmd:city>
                                    <gco:CharacterString>Harwell Oxford</gco:CharacterString>
                                 </gmd:city>
                                 <gmd:postalCode>
                                    <gco:CharacterString>OX11 0QX</gco:CharacterString>
                                 </gmd:postalCode>
                                 <gmd:country>
                                    <gco:CharacterString>UK</gco:CharacterString>
                                 </gmd:country>
                                 <gmd:electronicMailAddress>
                                    <gco:CharacterString>badc@rl.ac.uk</gco:CharacterString>
                                 </gmd:electronicMailAddress>
                              </gmd:CI_Address>
                           </gmd:address>
                        </gmd:CI_Contact>
                     </gmd:contactInfo>
                     <gmd:role>
                        <gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_RoleCode"
                                         codeListValue="distributor">distributor</gmd:CI_RoleCode>
                     </gmd:role>
                  </gmd:CI_ResponsibleParty>
               </gmd:distributorContact>
            </gmd:MD_Distributor>
         </gmd:distributor>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>https://catalogue.ceda.ac.uk/uuid/e52c3665affc48d741d235b734769366</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>CEDA Data Catalogue Page</gco:CharacterString>
                     </gmd:name>
                     <gmd:description>
                        <gco:CharacterString>Detail and access information for the resource</gco:CharacterString>
                     </gmd:description>
                     <gmd:function>
                        <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_OnLineFunctionCode"
                                                   codeListValue="information">information</gmd:CI_OnLineFunctionCode>
                     </gmd:function>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>http://data.ceda.ac.uk/badc/slimcat/data/UTLS_Ref_Atm/v1.0</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>DOWNLOAD</gco:CharacterString>
                     </gmd:name>
                     <gmd:description>
                        <gco:CharacterString>Download Data</gco:CharacterString>
                     </gmd:description>
                     <gmd:function>
                        <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_OnLineFunctionCode"
                                                   codeListValue="download">download</gmd:CI_OnLineFunctionCode>
                     </gmd:function>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>https://artefacts.ceda.ac.uk/badc_datadocs/slimcat/slimutls/metadata.html</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>The SLIMCAT Reference Atmosphere for UTLS-Ozone</gco:CharacterString>
                     </gmd:name>
                     <gmd:description>
                        <gco:CharacterString>No further details.</gco:CharacterString>
                     </gmd:description>
                     <gmd:function>
                        <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode"
                                                   codeListValue="information">information</gmd:CI_OnLineFunctionCode>
                     </gmd:function>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>http://homepages.see.leeds.ac.uk/~lecmc/tomcat.htm</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>TOMCAT/SLIMCAT Homepage</gco:CharacterString>
                     </gmd:name>
                     <gmd:description>
                        <gco:CharacterString>No further details.</gco:CharacterString>
                     </gmd:description>
                     <gmd:function>
                        <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode"
                                                   codeListValue="information">information</gmd:CI_OnLineFunctionCode>
                     </gmd:function>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>http://www.caribic-atmospheric.com/</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>Global Atmospheric Composition and Climate Change Research EUROPE's SOLUTION FOR GLOBAL ATMOSPHERE MONITORING</gco:CharacterString>
                     </gmd:name>
                     <gmd:description>
                        <gco:CharacterString>No further details.</gco:CharacterString>
                     </gmd:description>
                     <gmd:function>
                        <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode"
                                                   codeListValue="information">information</gmd:CI_OnLineFunctionCode>
                     </gmd:function>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>http://www.see.leeds.ac.uk/research/icas/research-themes/atmospheric-chemistry-and-aerosols/groups/atmospheric-chemistry/tomcatslimcat/</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>Atmospheric Chemistry Group TOMCAT/SLIMCAT 3D CTM</gco:CharacterString>
                     </gmd:name>
                     <gmd:description>
                        <gco:CharacterString>No further details.</gco:CharacterString>
                     </gmd:description>
                     <gmd:function>
                        <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode"
                                                   codeListValue="information">information</gmd:CI_OnLineFunctionCode>
                     </gmd:function>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
      </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:dataQualityInfo>
      <gmd:DQ_DataQuality>
         <gmd:scope>
            <gmd:DQ_Scope>
               <gmd:level>
                  <gmd:MD_ScopeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_ScopeCode"
                                    codeListValue="dataset">dataset</gmd:MD_ScopeCode>
               </gmd:level>
            </gmd:DQ_Scope>
         </gmd:scope>
         <gmd:report>
            <gmd:DQ_DomainConsistency>
               <gmd:result>
                  <gmd:DQ_ConformanceResult>
                     <gmd:specification>
                        <gmd:CI_Citation>
                           <gmd:title>
                              <gco:CharacterString>Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services</gco:CharacterString>
                           </gmd:title>
                           <gmd:date>
                              <gmd:CI_Date>
                                 <gmd:date>
                                    <gco:Date>2010-12-08</gco:Date>
                                 </gmd:date>
                                 <gmd:dateType>
                                    <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_DateTypeCode"
                                                         codeListValue="publication"/>
                                 </gmd:dateType>
                              </gmd:CI_Date>
                           </gmd:date>
                        </gmd:CI_Citation>
                     </gmd:specification>
                     <gmd:explanation gco:nilReason="inapplicable"/>
                     <gmd:pass gco:nilReason="unknown"/>
                  </gmd:DQ_ConformanceResult>
               </gmd:result>
            </gmd:DQ_DomainConsistency>
         </gmd:report>
         <gmd:lineage>
            <gmd:LI_Lineage>
               <gmd:statement>
                  <gco:CharacterString>New version of data created November 2009 to include parameter names and units in NetCDF files.
Directory v1.0/  contains original files provided by Martyn Chipperfield in 2002.
Top level slimcat data directory contains updated files.</gco:CharacterString>
               </gmd:statement>
            </gmd:LI_Lineage>
         </gmd:lineage>
      </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>