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ABSTRACT SUPPLIED BY ORIGINATOR: This paper presents updated tree-ring width (TRW) and maximum density (MXD) from Torneträsk in northern Sweden, now covering the period AD 500-2004. By including data from relatively young trees for the most recent period, a previously noted decline in recent MXD is eliminated. Non-climatological growth trends in the data are removed using Regional Curve Standardization (RCS), thus producing TRW and MXD chronologies with preserved low-frequency variability. The chronologies are calibrated using local and regional instrumental climate records. A boot-strapped response function analysis using regional climate data shows that tree growth is forced by April-August temperatures and that the regression weights for MXD are much stronger than for TRW. The robustness of the reconstruction equation is verified by independent temperature data and shows that 63-64% of the instrumental inter-annual variation is captured by the tree-ring data. This is a significant improvement compared to previously published reconstructions based on tree-ring data from Torneträsk. A divergence phenomenon around AD 1800, expressed as an increase in TRW that is not paralleled by temperature and MXD, is most likely an effect of major changes in the density of the pine population at this northern tree-line site. The bias introduced by this TRW phenomenon is assessed by producing a summer temperature reconstruction based on MXD exclusively. The new data show generally higher temperature estimates than previous reconstructions based on Torneträsk tree-ring data. The late-twentieth century, however, is not exceptionally warm in the new record: On decadal-to-centennial timescales, periods around AD 750, 1000, 1400, and 1750 were equally warm, or warmer. The 200-year long warm period centered on AD 1000 was significantly warmer than the late-twentieth century (p &lt; 0.05) and is supported by other local and regional paleoclimate data. The new tree-ring evidence from Torneträsk suggests that this &quot;Medieval Warm Period&quot; in northern Fennoscandia was much warmer than previously recognized.</gco:CharacterString>
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            <gco:CharacterString>NC</gco:CharacterString>
           </gmd:administrativeArea>
           <gmd:postalCode>
            <gco:CharacterString>28801-5001</gco:CharacterString>
           </gmd:postalCode>
           <gmd:country>
            <gco:CharacterString>USA</gco:CharacterString>
           </gmd:country>
           <gmd:electronicMailAddress>
            <gco:CharacterString>ncei.orders@noaa.gov</gco:CharacterString>
           </gmd:electronicMailAddress>
          </gmd:CI_Address>
         </gmd:address>
         <gmd:onlineResource>
          <gmd:CI_OnlineResource>
           <gmd:linkage>
            <gmd:URL>https://www.ncei.noaa.gov</gmd:URL>
           </gmd:linkage>
           <gmd:protocol>
            <gco:CharacterString>HTTPS</gco:CharacterString>
           </gmd:protocol>
           <gmd:applicationProfile>
            <gco:CharacterString>Web Browser</gco:CharacterString>
           </gmd:applicationProfile>
           <gmd:name>
            <gco:CharacterString>NOAA National Centers for Environmental Information (NCEI)</gco:CharacterString>
           </gmd:name>
           <gmd:description>
            <gco:CharacterString>NCEI home page with information, data access and contact information.</gco:CharacterString>
           </gmd:description>
           <gmd:function>
            <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
           </gmd:function>
          </gmd:CI_OnlineResource>
         </gmd:onlineResource>
         <gmd:hoursOfService>
          <gco:CharacterString>8:00 - 6:00 Eastern</gco:CharacterString>
         </gmd:hoursOfService>
        </gmd:CI_Contact>
       </gmd:contactInfo>
       <gmd:role>
        <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode>
       </gmd:role>
      </gmd:CI_ResponsibleParty>
     </gmd:distributorContact>
     <gmd:distributionOrderProcess>
      <gmd:MD_StandardOrderProcess>
       <gmd:fees>
        <gco:CharacterString>In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.</gco:CharacterString>
       </gmd:fees>
      </gmd:MD_StandardOrderProcess>
     </gmd:distributionOrderProcess>
     <gmd:distributorFormat>
      <gmd:MD_Format>
       <gmd:name>
        <gco:CharacterString>Native Format(s)</gco:CharacterString>
       </gmd:name>
       <gmd:version gco:nilReason="missing"></gmd:version>
      </gmd:MD_Format>
     </gmd:distributorFormat>
     <gmd:distributorTransferOptions>
      <gmd:MD_DigitalTransferOptions>
       <gmd:onLine>
        <gmd:CI_OnlineResource>
         <gmd:linkage>
          <gmd:URL>https://doi.org/10.25921/fpp4-yp05</gmd:URL>
         </gmd:linkage>
         <gmd:protocol>
          <gco:CharacterString>HTTPS</gco:CharacterString>
         </gmd:protocol>
         <gmd:applicationProfile>
          <gco:CharacterString>Landing Page</gco:CharacterString>
         </gmd:applicationProfile>
         <gmd:name>
          <gco:CharacterString>NCEI landing page for this dataset</gco:CharacterString>
         </gmd:name>
         <gmd:description>
          <gco:CharacterString>Dataset landing page with general information and links to access the data.</gco:CharacterString>
         </gmd:description>
         <gmd:function>
          <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
         </gmd:function>
        </gmd:CI_OnlineResource>
       </gmd:onLine>
       <gmd:onLine>
        <gmd:CI_OnlineResource>
         <gmd:linkage>
          <gmd:URL>https://www.ncdc.noaa.gov/paleo/study/17262</gmd:URL>
         </gmd:linkage>
         <gmd:protocol>
          <gco:CharacterString>HTTPS</gco:CharacterString>
         </gmd:protocol>
         <gmd:applicationProfile>
          <gco:CharacterString>Web Browser</gco:CharacterString>
         </gmd:applicationProfile>
         <gmd:name>
          <gco:CharacterString>NCEI Study Page</gco:CharacterString>
         </gmd:name>
         <gmd:description>
          <gco:CharacterString>Study page with dataset access information.</gco:CharacterString>
         </gmd:description>
         <gmd:function>
          <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="search">search</gmd:CI_OnLineFunctionCode>
         </gmd:function>
        </gmd:CI_OnlineResource>
       </gmd:onLine>
       <gmd:onLine>
        <gmd:CI_OnlineResource>
         <gmd:linkage>
          <gmd:URL>https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/tree-ring</gmd:URL>
         </gmd:linkage>
         <gmd:protocol>
          <gco:CharacterString>HTTPS</gco:CharacterString>
         </gmd:protocol>
         <gmd:applicationProfile>
          <gco:CharacterString>Information</gco:CharacterString>
         </gmd:applicationProfile>
         <gmd:name>
          <gco:CharacterString>NCEI Tree Ring Page</gco:CharacterString>
         </gmd:name>
         <gmd:description>
          <gco:CharacterString>General information for this data type.</gco:CharacterString>
         </gmd:description>
         <gmd:function>
          <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
         </gmd:function>
        </gmd:CI_OnlineResource>
       </gmd:onLine>
       <gmd:onLine>
        <gmd:CI_OnlineResource>
         <gmd:linkage>
          <gmd:URL>https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/europe/swed334.rwl</gmd:URL>
         </gmd:linkage>
         <gmd:protocol>
          <gco:CharacterString>HTTPS</gco:CharacterString>
         </gmd:protocol>
         <gmd:applicationProfile>
          <gco:CharacterString>Download</gco:CharacterString>
         </gmd:applicationProfile>
         <gmd:name>
          <gco:CharacterString>/treering/measurements/europe/swed334.rwl</gco:CharacterString>
         </gmd:name>
         <gmd:description>
          <gco:CharacterString>Raw Measurements</gco:CharacterString>
         </gmd:description>
         <gmd:function>
          <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
         </gmd:function>
        </gmd:CI_OnlineResource>
       </gmd:onLine>
       <gmd:onLine>
        <gmd:CI_OnlineResource>
         <gmd:linkage>
          <gmd:URL>https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/europe/swed334-noaa.rwl</gmd:URL>
         </gmd:linkage>
         <gmd:protocol>
          <gco:CharacterString>HTTPS</gco:CharacterString>
         </gmd:protocol>
         <gmd:applicationProfile>
          <gco:CharacterString>Download</gco:CharacterString>
         </gmd:applicationProfile>
         <gmd:name>
          <gco:CharacterString>/treering/measurements/europe/swed334-noaa.rwl</gco:CharacterString>
         </gmd:name>
         <gmd:description>
          <gco:CharacterString>Raw Measurements</gco:CharacterString>
         </gmd:description>
         <gmd:function>
          <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
         </gmd:function>
        </gmd:CI_OnlineResource>
       </gmd:onLine>
       <gmd:onLine>
        <gmd:CI_OnlineResource>
         <gmd:linkage>
          <gmd:URL>https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/swed334.txt</gmd:URL>
         </gmd:linkage>
         <gmd:protocol>
          <gco:CharacterString>HTTPS</gco:CharacterString>
         </gmd:protocol>
         <gmd:applicationProfile>
          <gco:CharacterString>Download</gco:CharacterString>
         </gmd:applicationProfile>
         <gmd:name>
          <gco:CharacterString>/treering/measurements/correlation-stats/swed334.txt</gco:CharacterString>
         </gmd:name>
         <gmd:description>
          <gco:CharacterString>Correlation</gco:CharacterString>
         </gmd:description>
         <gmd:function>
          <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
         </gmd:function>
        </gmd:CI_OnlineResource>
       </gmd:onLine>
      </gmd:MD_DigitalTransferOptions>
     </gmd:distributorTransferOptions>
    </gmd:MD_Distributor>
   </gmd:distributor>
  </gmd:MD_Distribution>
 </gmd:distributionInfo>
 <gmd:metadataMaintenance>
  <gmd:MD_MaintenanceInformation>
   <gmd:maintenanceAndUpdateFrequency>
    <gmd:MD_MaintenanceFrequencyCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded">asNeeded</gmd:MD_MaintenanceFrequencyCode>
   </gmd:maintenanceAndUpdateFrequency>
   <gmd:maintenanceNote>
    <gco:CharacterString>This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25</gco:CharacterString>
   </gmd:maintenanceNote>
  </gmd:MD_MaintenanceInformation>
 </gmd:metadataMaintenance>
</gmi:MI_Metadata>