<DIF xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.8.4.xsd">
  <Entry_ID>noaa-recon-13196</Entry_ID>
  <Entry_Title>Texas 500 Year Palmer Drought Severity Index Reconstructions</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Cleaveland, M.K.; Votteler, T.H.; Stahle, D.K.; Casteel, R.C.; Banner, J.L.</Dataset_Creator>
    <Dataset_Title>Texas 500 Year Palmer Drought Severity Index Reconstructions</Dataset_Title>
    <Dataset_Release_Date>2012-08-07</Dataset_Release_Date>
    <Dataset_Publisher>NCDC-Paleoclimatology</Dataset_Publisher>
    <Data_Presentation_Form>ONLINE Files</Data_Presentation_Form>
    <Dataset_DOI>Pending</Dataset_DOI>
    <Online_Resource>https://www.ncdc.noaa.gov/paleo/study/13196</Online_Resource>
  </Data_Set_Citation>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>M.K.</First_Name>
    <Last_Name>Cleaveland</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>T.H.</First_Name>
    <Last_Name>Votteler</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>D.K.</First_Name>
    <Last_Name>Stahle</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.C.</First_Name>
    <Last_Name>Casteel</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>J.L.</First_Name>
    <Last_Name>Banner</Last_Name>
  </Personnel>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|tree ring</Term>
    <Detailed_Variable>age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>instrumental</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,instrumental,null,null,N,TX6</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|tree ring</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,TX5</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|tree ring</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,TX8</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>instrumental</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,instrumental,null,null,N,TX8</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|tree ring</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,TX6</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>instrumental</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,instrumental,null,null,N,TX5</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>instrumental</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,instrumental,null,null,N,TX7</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|tree ring</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,TX7</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>reconstructions</Term>
    <Variable_Level_1>ground water</Variable_Level_1>
  </Parameters>
  <ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
  <Keyword>Palmer Drought Index Reconstruction</Keyword>
  <Keyword>drought</Keyword>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>1500 AD</Paleo_Start_Date>
    <Paleo_Stop_Date>2008 AD</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>450 cal yr BP</Paleo_Start_Date>
    <Paleo_Stop_Date>-58 cal yr BP</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Data_Set_Progress>Complete</Data_Set_Progress>
  <Spatial_Coverage>
    <Southernmost_Latitude>29</Southernmost_Latitude>
    <Northernmost_Latitude>31.5</Northernmost_Latitude>
    <Westernmost_Longitude>-103.5</Westernmost_Longitude>
    <Easternmost_Longitude>-95.5</Easternmost_Longitude>
  </Spatial_Coverage>
  <Location>
    <Location_Category>Continent</Location_Category>
    <Location_Type>North America</Location_Type>
    <Location_Subregion1>United States Of America</Location_Subregion1>
    <Location_Subregion2>Texas</Location_Subregion2>
    <Detailed_Location>Texas Climate Division 5 (Trans Pecos)&gt;LATITUDE 31.5&gt;LONGITUDE -103.5</Detailed_Location>
  </Location>
  <Location>
    <Location_Category>Continent</Location_Category>
    <Location_Type>North America</Location_Type>
    <Location_Subregion1>United States Of America</Location_Subregion1>
    <Location_Subregion2>Texas</Location_Subregion2>
    <Detailed_Location>Texas Climate Division 6 (Edwards Plateau)&gt;LATITUDE 31&gt;LONGITUDE -100</Detailed_Location>
  </Location>
  <Location>
    <Location_Category>Continent</Location_Category>
    <Location_Type>North America</Location_Type>
    <Location_Subregion1>United States Of America</Location_Subregion1>
    <Location_Subregion2>Texas</Location_Subregion2>
    <Detailed_Location>Texas Climate Division 7 (South Central)&gt;LATITUDE 30.5&gt;LONGITUDE -97.5</Detailed_Location>
  </Location>
  <Location>
    <Location_Category>Continent</Location_Category>
    <Location_Type>North America</Location_Type>
    <Location_Subregion1>United States Of America</Location_Subregion1>
    <Location_Subregion2>Texas</Location_Subregion2>
    <Detailed_Location>Texas Climate Division 8 (Upper Coast)&gt;LATITUDE 29&gt;LONGITUDE -95.5</Detailed_Location>
  </Location>
  <Access_Constraints>None</Access_Constraints>
  <Use_Constraints>Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.</Use_Constraints>
  <Data_Set_Language>English</Data_Set_Language>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>DOC/NOAA/NESDIS/NCEI</Short_Name>
      <Long_Name>National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce </Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>https://www.ncdc.noaa.gov/data-access/paleoclimatology-data</Data_Center_URL>
    <Personnel>
      <Role>DATA Center Contact</Role>
      <First_Name>Bruce</First_Name>
      <Last_Name>Bauer</Last_Name>
      <Email>bruce.a.bauer@noaa.gov</Email>
      <Email>paleo@noaa.gov</Email>
      <Phone>303-497-6280</Phone>
      <Fax>303-497-6513</Fax>
      <Contact_Address>
        <Address>325 Broadway, E/NE31</Address>
        <City>Boulder</City>
        <Province_or_State>CO</Province_or_State>
        <Postal_Code>80305-3328</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Distribution>
    <Distribution_Media>online</Distribution_Media>
    <Distribution_Format>ASCII</Distribution_Format>
  </Distribution>
  <Reference>Cleaveland, M.K., T.H. Votteler, D.K. Stahle, R.C. Casteel, 
and J.L. Banner. 2011. 
Extended Chronology of Drought in South Central, Southeastern 
and West Texas.
Texas Water Journal, Vol. 2, No. 1, pp. 54-96, December 2011. </Reference>
  <Summary>
    <Abstract>Short instrumental climatic records prevent appropriate statistical 
and historical characterization of extreme events such as the extent, 
duration, and severity of multiyear droughts. The best solution is 
to extend climatic records through well-understood proxies of climate. 
One of the best such proxies is climate-sensitive annual tree rings, 
which can be dated precisely to the year, are easily sampled, and are 
widely distributed. We created 3 new baldcypress chronologies in South 
Central Texas and used them, along with existing Douglas-fir chronologies 
from West Texas and a composite post oak chronology in Central Texas,
to calibrate 1931-2008 and reconstruct June Palmer Drought Severity 
Index (PDSI) in Texas climate divisions 5 (Trans Pecos), 6 (Edwards 
Plateau), 7 (S. Central), and 8 (Upper Coast) 1500-2008. We validated 
the reconstructions against observed data not used in calibration. 
Most water planners in Texas at present use the drought of the 1950s, 
1950-1956, as a worst-case scenario. Our reconstructions show, however, 
that a number of extended droughts of the past were longer and/or more 
intense than the 1950s drought. Furthermore, extended droughts have 
been a consistent feature of southwestern climate since the 800s, 
including at least 4megadroughts 15- to 30-years long centered in 
central or northern Mexico (Stahle et al. 2009; 2011b). This and 
previous studies indicate that severe decadal-scale droughts have 
occurred in Texas at least once a century since the 1500s. Current 
use by water planners of the 1950s drought as a worst-case scenario, 
therefore, is questionable. When water managers consider past droughts, 
population growth, and climate change, it becomes highly probable 
that the future poses unprecedented challenges. 
          STUDY NOTES: Tree-ring based Palmer Drought Severity Index (PDSI) reconstructions 
for 4 south-central Texas Climate Divisions over the past 500 years. 
The areas of the PDSI reconstructions are climate divisions 5 
(Trans Pecos), 6 (Edwards Plateau), 7 (S. Central), and 8 (Upper Coast).  
The tree-ring data utilized in the reconstructions are archived 
in the International Tree-Ring Data Bank (ITRDB), available at:
http://www.ncdc.noaa.gov/paleo/treering.html 

The chronologies used are: 

Guadalupe River State Park, TADI, ITRDB TX052  
Krause Springs, TADI, ITRDB TX053 
San Bernard River (Bates Allen Park), TADI, ITRDB TX054
South Texas Composite post oak, QUST, ITRDB TX049
Big Bend National Park, PSME, ITRDB TX001
Guadalupe Peak, PSME, ITRDB TX046 (also recollected in 2008)</Abstract>
  </Summary>
  <Related_URL>
    <URL_Content_Type>
      <Type>GET DATA</Type>
    </URL_Content_Type>
    <URL>https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/northamerica/usa/texas/texas2011pdsi.txt</URL>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>GET DATA</Type>
    </URL_Content_Type>
    <URL>https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/northamerica/usa/texas/texas2011pdsi.xls</URL>
  </Related_URL>
  <IDN_Node>
    <Short_Name>USA/NOAA</Short_Name>
  </IDN_Node>
  <Metadata_Name>DIF</Metadata_Name>
  <Metadata_Version>Version 9.8.4</Metadata_Version>
  <DIF_Creation_Date>2019-05-30</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2019-05-29</Last_DIF_Revision_Date>
</DIF>
