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        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>23.96</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>23.96</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>54.09</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>54.09</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Massis del Pedraforca (PED)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>1.7</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>1.7</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>42.23</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>42.23</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Poellau (POE)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>15.81</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>15.81</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>47.31</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>47.31</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Rennes (REN)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>-1.83</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>-1.83</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>48.02</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>48.02</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Monte Pollino (SER)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>16.21</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>16.21</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>39.93</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>39.93</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Suwałki (SUW)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>23.25</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>23.25</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>53.95</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>53.95</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Vigera (VIG)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>8.77</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>8.77</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>46.05</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>46.05</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Vinuesa (VIN)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>2.75</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>2.75</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>42</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>42</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Windsor (WIN)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>-0.61</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>-0.61</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>51.43</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>51.43</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
       <gmd:EX_Extent>
        <gmd:description>
         <gco:CharacterString>Woburn (WOB)</gco:CharacterString>
        </gmd:description>
        <gmd:geographicElement>
         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>-0.59</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>-0.59</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>51.98</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>51.98</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
       </gmd:EX_Extent>
      </gmd:extent>
     </gmd:MD_DataIdentification>
    </gmd:identificationInfo>
    <gmd:distributionInfo>
     <gmd:MD_Distribution>
      <gmd:transferOptions>
       <gmd:MD_DigitalTransferOptions>
        <gmd:onLine>
         <gmd:CI_OnlineResource>
          <gmd:linkage>
           <gmd:URL>http://doi.org/10.5880/GFZ.4.3.2023.001</gmd:URL>
          </gmd:linkage>
          <gmd:protocol>
           <gco:CharacterString>WWW:LINK-1.0-http--link</gco:CharacterString>
          </gmd:protocol>
          <gmd:name>
           <gco:CharacterString>Data Access - DOI</gco:CharacterString>
          </gmd:name>
          <gmd:description>
           <gco:CharacterString>Data Access - DOI</gco:CharacterString>
          </gmd:description>
          <gmd:function>
           <gmd:CI_OnLineFunctionCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode_information">information</gmd:CI_OnLineFunctionCode>
          </gmd:function>
         </gmd:CI_OnlineResource>
        </gmd:onLine>
       </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
     </gmd:MD_Distribution>
    </gmd:distributionInfo>
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     <gmd:DQ_DataQuality>
      <gmd:scope>
       <gmd:DQ_Scope>
        <gmd:level>
         <gmd:MD_ScopeCode codeListValue="dataset" codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_ScopeCode"/>
        </gmd:level>
       </gmd:DQ_Scope>
      </gmd:scope>
      <gmd:lineage>
       <gmd:LI_Lineage>
        <gmd:statement>
         <gco:CharacterString>Wood increment cores of 15 or more Pinus sylvestris, Quercus robur/petraea or Cedrus atlantica tree individuals were taken. Dendro-dated tree-ring material of  4-5 individuals per site was dissected and pooled year by year.  After cellulose extraction and homogenization, 18O/16O-ratios of annually resolved samples were determined by Isotope Ratio Mass Spectrometry (IRMS). Time series of 18O/16O are given as d-values versus SMOW. Details can be found in the downloadable “data description” file.</gco:CharacterString>
        </gmd:statement>
       </gmd:LI_Lineage>
      </gmd:lineage>
     </gmd:DQ_DataQuality>
    </gmd:dataQualityInfo>
   </gmd:MD_Metadata>