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The particles measured include VOCs captured in the field using thermal desorption tubes, and then analysed into the component species using highly sensitive Markes International GCxGC-TOF-MS system, and ultrafines data captured using a V2000 sensor from National Air Quality Testing Services by Emissions Analytics.   Therefore, a much wider range of pollutants have been tested than in standard air quality monitoring. 

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This dataset contains interior air quality measurements made on a range of modes of transport including diesel and electric trains, the London Underground, diesel and electric buses, and old and new cars, including a battery electric.</gco:CharacterString>
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               </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>2021-05-17T00:00:00</gml:beginPosition>
                           <gml:endPosition>2021-05-25T23:59:59</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 BADC-CSV 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>NERC EDS Centre for Environmental Data Analysis</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>01235446432</gco:CharacterString>
                                 </gmd:voice>
                              </gmd:CI_Telephone>
                           </gmd:phone>
                           <gmd:address>
                              <gmd:CI_Address>
                                 <gmd:deliveryPoint>
                                    <gco:CharacterString>RAL Space</gco:CharacterString>
                                 </gmd:deliveryPoint>
                                 <gmd:deliveryPoint>
                                    <gco:CharacterString>STFC Rutherford Appleton Laboratory, Harwell Campus</gco:CharacterString>
                                 </gmd:deliveryPoint>
                                 <gmd:city>
                                    <gco:CharacterString>Didcot</gco:CharacterString>
                                 </gmd:city>
                                 <gmd:postalCode>
                                    <gco:CharacterString>OX11 0QX</gco:CharacterString>
                                 </gmd:postalCode>
                                 <gmd:country>
                                    <gco:CharacterString>United Kingdom</gco:CharacterString>
                                 </gmd:country>
                                 <gmd:electronicMailAddress>
                                    <gco:CharacterString>support@ceda.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/96c912c7c0094da2a8627d446cb06708</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/deposited2022/TRANSITION_Exposure_to_VOCs/</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://transition-air.org.uk/research/</gmd:URL>
                     </gmd:linkage>
                     <gmd:name>
                        <gco:CharacterString>TRANSITION project webpage</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>VOC data was captured in the field using thermal desorption tubes, which were then analysed by Emissions Analytics on a Markes International GCxGC-TOF-MS system.  
Particle number data was captured using a V2000 from National Air Quality Testing Services

The data was delivered to CEDA from Emissions Analytics.</gco:CharacterString>
               </gmd:statement>
            </gmd:LI_Lineage>
         </gmd:lineage>
      </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>