<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-11749</Entry_ID>
  <Entry_Title>Nino3.4 SST 460 Year Reconstructions</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Wilson, R.J.S.; Cook, E.R.; D&apos;Arrigo, R.D.; Riedwyl, N.; Evans, M.N.; Tudhope, A.W.; Allan, R.J.</Dataset_Creator>
    <Dataset_Title>Nino3.4 SST 460 Year Reconstructions</Dataset_Title>
    <Dataset_Release_Date>2011-06-29</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/11749</Online_Resource>
  </Data_Set_Citation>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.J.S.</First_Name>
    <Last_Name>Wilson</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>E.R.</First_Name>
    <Last_Name>Cook</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.D.</First_Name>
    <Last_Name>D&apos;Arrigo</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>N.</First_Name>
    <Last_Name>Riedwyl</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>M.N.</First_Name>
    <Last_Name>Evans</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>A.W.</First_Name>
    <Last_Name>Tudhope</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.J.</First_Name>
    <Last_Name>Allan</Last_Name>
  </Personnel>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|corals and sclerosponges</Term>
    <Detailed_Variable>sea surface temperature,null,null,standard deviation unit,annual,climate reconstructions|corals and sclerosponges,normalized,composite plus regression|principal component analysis|regression analysis,N,center of action proxies; anomalized wrt 1900-1980; composite average of three reconstruction techniques</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|corals and sclerosponges</Term>
    <Detailed_Variable>sea surface temperature,null,null,degree Celsius,annual,climate reconstructions|corals and sclerosponges,anomalized,composite plus regression,N,center of action proxies; anomalized wrt 1961-1990</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions</Term>
    <Detailed_Variable>sea surface temperature,multiple proxies,null,degree Celsius,annual,climate reconstructions,anomalized,composite plus regression,N,teleconnected proxies; anomalized wrt 1961-1990AD</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions</Term>
    <Detailed_Variable>sea surface temperature,multiple proxies,null,degree Celsius,annual,climate reconstructions,anomalized,principal component analysis|regression analysis,N,teleconnected proxies; anomalized wrt 1961-1990AD; principal components regression</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|corals and sclerosponges</Term>
    <Detailed_Variable>age,null,null,year Common Era,null,climate reconstructions|corals and sclerosponges,null,null,N,null</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|corals and sclerosponges</Term>
    <Detailed_Variable>sea surface temperature,null,null,degree Celsius,annual,climate reconstructions|corals and sclerosponges,anomalized,principal component analysis|regression analysis,N,center of action proxies; anomalized wrt 1961-1991; principal components regression</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions|corals and sclerosponges</Term>
    <Detailed_Variable>sea surface temperature,null,null,degree Celsius,annual,climate reconstructions|corals and sclerosponges,anomalized,regression analysis,N,center of action proxies; anomalized wrt 1961-1992; regularized expectation maximization</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions</Term>
    <Detailed_Variable>sea surface temperature,multiple proxies,null,degree Celsius,annual,climate reconstructions,anomalized,regression analysis,N,teleconnected proxies; anomalized wrt 1961-1990AD; regularized expectation maximization</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>climate reconstructions</Term>
    <Detailed_Variable>sea surface temperature,multiple proxies,null,standard deviation unit,annual,climate reconstructions,normalized,composite plus regression|principal component analysis|regression analysis,N,teleconnected proxies; anomalized wrt 1900-1980AD; composite average of three reconstruction techniques</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>reconstructions</Term>
    <Variable_Level_1>atmospheric circulation</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>reconstructions</Term>
    <Variable_Level_1>sea surface temperature</Variable_Level_1>
  </Parameters>
  <ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
  <Keyword>Atmospheric and Oceanic Circulation Patterns Reconstruction</Keyword>
  <Keyword>ENSO</Keyword>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>1540 AD</Paleo_Start_Date>
    <Paleo_Stop_Date>2007 AD</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>410 cal yr BP</Paleo_Start_Date>
    <Paleo_Stop_Date>-57 cal yr BP</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Data_Set_Progress>Complete</Data_Set_Progress>
  <Spatial_Coverage>
    <Southernmost_Latitude>-5</Southernmost_Latitude>
    <Northernmost_Latitude>5</Northernmost_Latitude>
    <Westernmost_Longitude>-170</Westernmost_Longitude>
    <Easternmost_Longitude>-120</Easternmost_Longitude>
  </Spatial_Coverage>
  <Location>
    <Location_Category>Ocean</Location_Category>
    <Location_Type>Pacific Ocean</Location_Type>
    <Location_Subregion1>Eastern Pacific Ocean</Location_Subregion1>
    <Detailed_Location>Nino3.4&gt;LATITUDE &gt;LONGITUDE </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>Wilson, R., E. Cook, R. D&apos;Arrigo, N. Riedwyl, M.N. Evans, 
A. Tudhope, and R. Allan. 2010. 
Reconstructing ENSO: the influence of method, proxy data, 
climate forcing and teleconnections. 
Journal of Quaternary Science, Vol. 25, Issue 1, pp. 62–78, 
January 2010. DOI: 10.1002/jqs.1297, ISSN 0267-8179. 
</Reference>
  <Summary>
    <Abstract>In this study we compare three newly developed independent NINO3.4 
sea surface temperature (SST) reconstructions using data from 
(1) the central Pacific (corals), (2) the TexMex region of the 
USA (tree rings) and (3) other regions in the Tropics (corals 
and an ice core) which are teleconnected with central Pacific 
SSTs in the 20th century. Although these three reconstructions 
are strongly calibrated and well verified, inter-proxy comparison 
shows a significant weakening in interproxy coherence in the 
19th century. This breakdown in common signal could be related 
to insufficient data, dating errors in some of the proxy records 
or a breakdown in El Nino–Southern Oscillation&apos;s (ENSO&apos;s) influence 
on other regions.  However, spectral analysis indicates that each 
reconstruction portrays ENSO-like spectral properties. Superposed 
epoch analysis also shows that each reconstruction shows a 
generally consistent &apos;El Nino-like&apos; response to major volcanic 
events in the following year, while during years T+4 to T+7 
&apos;La Nina-like&apos; conditions prevail. These results suggest that 
each of the series expresses ENSO-like &apos;behaviour&apos;, but this 
&apos;behaviour&apos; does not appear to be spatially or temporally consistent. 
This result may reflect published observations that there appear 
to be distinct &apos;types&apos; of ENSO variability depending on location 
within the tropical Pacific. Future work must address potential 
dating issues within some proxies (i.e. sampling of multiple 
coral heads for one location) as well as assessing the time 
stability of local climate relationships with central Pacific SSTs. 
More emphasis is needed on sampling new and extending old coral 
proxy records from the crucial central and eastern tropical 
 
          STUDY NOTES: Nino3.4 SST reconstructions based on a variety of proxy data, 
utilizing 3 reconstruction methodologies, for the core ENSO 
region in the central and eastern tropical Pacific, and for 
other tropical regions displaying teleconnected ENSO responses. 
The first region is labeled the &apos;centre of action&apos; (COA), 
located in the central and eastern Pacific, where SSTs are 
positively correlated with NINO3.4 SSTs.  The second region 
is the &apos;teleconnection&apos; (TEL) region covering all other 
tropical areas where SSTs are either inversely 
(e.g. Indonesia to Tonga) or positively (e.g. Indian Ocean) 
correlated with NINO3.4 SSTs. 

Independent reconstructions of annual NINO3.4 SSTs were 
developed for the COA and TEL regions, using three approaches: 
(1) composite plus regression, (2) principal component regression, 
and (3) regularised expectation maximisation. 
</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/enso-wilson2010.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/enso-wilson2010.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>2019-05-17</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2019-05-17</Last_DIF_Revision_Date>
</DIF>
