<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-11175</Entry_ID>
  <Entry_Title>Mesoamerican 1238 Year June PDSI Reconstructions</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Stahle, D.W.; Diaz, J.V.; Burnette, D.J.; Paredes, J.C.; Heim, R.R.; Fye, F.K.; Acuña Soto, R.; Therrell, M.D.; Cleaveland, M.K.; Stahle, D.K.</Dataset_Creator>
    <Dataset_Title>Mesoamerican 1238 Year June PDSI Reconstructions</Dataset_Title>
    <Dataset_Release_Date>2011-05-27</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/11175</Online_Resource>
  </Data_Set_Citation>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>D.W.</First_Name>
    <Last_Name>Stahle</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>J.V.</First_Name>
    <Last_Name>Diaz</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>D.J.</First_Name>
    <Last_Name>Burnette</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>J.C.</First_Name>
    <Last_Name>Paredes</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.R.</First_Name>
    <Last_Name>Heim</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>F.K.</First_Name>
    <Last_Name>Fye</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.</First_Name>
    <Last_Name>Acuña Soto</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>M.D.</First_Name>
    <Last_Name>Therrell</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>M.K.</First_Name>
    <Last_Name>Cleaveland</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>D.K.</First_Name>
    <Last_Name>Stahle</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>climate reconstructions|tree ring</Term>
    <Detailed_Variable>Palmer Drought Severity Index,null,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,AR(2) persistence structure of the predictand was added back in and the variance lost in regression was restored.</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,whitened,null,N,whitened&apos; = serially random residuals from an autoregressive model of order p fit to the original time series</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>tree ring</Term>
    <Detailed_Variable>tree ring standardized growth index,null,null,null,null,tree ring,composited,standard,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,&quot;extracted for 84 grid locations in central Mexico from the R.R. Heim, Jr., half degree monthly PDSI data set for North America.&quot;</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,whitened,null,N,based on a calibration between the serially random predictor and predictand time series</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,smoothed,null,N,30-year spline fit</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>tree ring</Term>
    <Detailed_Variable>tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,&quot;whitened using the coefficients of the AR(2) model calculated from the instrumental June PDSI, 1973-2003&quot;</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>771 AD</Paleo_Start_Date>
    <Paleo_Stop_Date>2008 AD</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>1179 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>20.35</Southernmost_Latitude>
    <Northernmost_Latitude>20.35</Northernmost_Latitude>
    <Westernmost_Longitude>-100.1167</Westernmost_Longitude>
    <Easternmost_Longitude>-100.1167</Easternmost_Longitude>
    <Minimum_Altitude>1970</Minimum_Altitude>
    <Maximum_Altitude>1970</Maximum_Altitude>
  </Spatial_Coverage>
  <Location>
    <Location_Category>Continent</Location_Category>
    <Location_Type>North America</Location_Type>
    <Location_Subregion1>Mexico</Location_Subregion1>
    <Location_Subregion2>Queretaro de Arteaga</Location_Subregion2>
    <Detailed_Location>Barranca de Amealco&gt;LATITUDE 20.35&gt;LONGITUDE -100.1167</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>Stahle, D.W., J.V. Diaz, D.J. Burnette, J.C. Paredes, 
R.R. Heim Jr., F.K. Fye, R. Acuna Soto, M.D. Therrell, 
M.K. Cleaveland, and D.K. Stahle. 2011. 
Major Mesoamerican droughts of the past millennium. 
Geophysical Research Letters, Vol. 38, L05703, 
doi:10.1029/2010GL046472.</Reference>
  <Summary>
    <Abstract>Ancient Montezuma baldcypress (Taxodium mucronatum) trees 
found in Barranca de Amealco, Queretaro, have been used to 
develop a 1,238-year treering chronology that is correlated 
with precipitation, temperature, drought indices, and crop 
yields in central Mexico. This chronology has been used to 
reconstruct the spring-early summer soil moisture balance 
over the heartland of the Mesoamerican cultural province, 
and is the first exactly dated, annually resolved paleoclimatic 
record for Mesoamerica spanning the Late Classic, Post Classic, 
Colonial, and modern eras. The reconstruction indicates that 
the Terminal Classic drought extended into central Mexico, 
supporting other sedimentary and speleothem evidence for this 
early 10th century drought in Mesoamerica. The reconstruction 
also documents severe and sustained drought during the decline 
of the Toltec state (1149-1167) and during the Spanish conquest 
of the Aztec state (1514-1539), providing a new precisely dated 
climate framework for Mesoamerican cultural change.  
          STUDY NOTES: Tree ring reconstruction of June Palmer Drought Severity Index 
(PDSI) for central Mexico for the past 1238 years. Also archived 
are the instrumental June PDSI, extracted for 84 grid locations 
in central Mexico from the R.R. Heim, Jr., half degree monthly 
PDSI data set for North America, the standard tree-ring 
chronology from Barranca de Amealco, and the calibration 
and verification statistics for the whitened and final 
reddened reconstructions. The gridpoints range from 
16.8°N to 21.3°N, and from 96.3°W to 102.3°W. </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/mexico/mesoamerica2011pdsi.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/mexico/mesoamerica2011pdsi.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>2019-06-03</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2019-06-03</Last_DIF_Revision_Date>
</DIF>
