<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<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_v9.7.1.xsd">
  <Entry_ID>NSIDC-0307</Entry_ID>
  <Entry_Title>Cosmogenic Radionuclides in the Siple Dome A Ice Core</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Kunihiko Nishiizumi</Dataset_Creator>
    <Dataset_Title>Cosmogenic Radionuclides in the Siple Dome A Ice Core</Dataset_Title>
    <Dataset_Release_Date>2007-05-31</Dataset_Release_Date>
    <Dataset_Release_Place>Boulder, Colorado USA</Dataset_Release_Place>
    <Dataset_Publisher>NSIDC: National Snow and Ice Data Center</Dataset_Publisher>
    <Online_Resource>http://nsidc.org/data/nsidc-0307.html</Online_Resource>
    <Dataset_DOI>http://dx.doi.org/10.7265/N5XK8CGS</Dataset_DOI>
  </Data_Set_Citation>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>K.</First_Name>
    <Last_Name>Nishiizumi</Last_Name>
    <Email>kuni@ssl.berkeley.edu</Email>
    <Phone>1 510 643-9361 </Phone>
    <Fax>1 510  643-7629 </Fax>
    <Contact_Address>
      <Address>7 Gauss Way</Address>
      <City>Berkeley</City>
      <Province_or_State>CA</Province_or_State>
      <Postal_Code>94720-7450</Postal_Code>
      <Country>USA</Country>
    </Contact_Address>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>R.</First_Name>
    <Middle_Name>C.</Middle_Name>
    <Last_Name>Finkel</Last_Name>
    <Email>finkel1@llnl.gov</Email>
    <Phone>1 925 422-2044 </Phone>
    <Fax>1 925  422-0208 </Fax>
    <Contact_Address>
      <Address>LLNL, L-219</Address>
      <City>Livermore</City>
      <Province_or_State>CA</Province_or_State>
      <Postal_Code>64550</Postal_Code>
      <Country>USA</Country>
    </Contact_Address>
  </Personnel>
  <Personnel>
    <Role>Technical Contact</Role>
    <First_Name>NSIDC</First_Name>
    <Last_Name>User Services</Last_Name>
    <Email>nsidc@nsidc.org</Email>
    <Phone>1 303 492-6199 x</Phone>
    <Fax>1 303  492-2468 x</Fax>
    <Contact_Address>
      <Address>National Snow and Ice Data Center</Address>
      <Address>CIRES, 449 UCB</Address>
      <Address>University of Colorado</Address>
      <City>Boulder</City>
      <Province_or_State>CO</Province_or_State>
      <Postal_Code>80309-0449</Postal_Code>
      <Country>USA</Country>
    </Contact_Address>
  </Personnel>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Snow/Ice</Term>
    <Variable_Level_1>Snow/Ice Chemistry</Variable_Level_1>
    <Detailed_Variable>Cosmogenic Radionuclides</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Paleoclimate</Topic>
    <Term>Ice Core Records</Term>
    <Variable_Level_1>Isotopes</Variable_Level_1>
    <Detailed_Variable>Beryllium-10</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Paleoclimate</Topic>
    <Term>Ice Core Records</Term>
    <Variable_Level_1>Isotopes</Variable_Level_1>
    <Detailed_Variable>Chlorine-36</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Terrestrial Hydrosphere</Topic>
    <Term>Glaciers/Ice Sheets</Term>
    <Variable_Level_1>Ice Sheets</Variable_Level_1>
    <Detailed_Variable>Cosmogenic Radionuclides</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Terrestrial Hydrosphere</Topic>
    <Term>Snow/Ice</Term>
    <Variable_Level_1>Snow/Ice Chemistry</Variable_Level_1>
  </Parameters>
  <ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category>
  <Keyword>AGDC</Keyword>
  <Keyword>Antarctica</Keyword>
  <Keyword>Beryllium-10</Keyword>
  <Keyword>Chlorine-36</Keyword>
  <Keyword>Cosmogenic nuclide</Keyword>
  <Keyword>Ice Core</Keyword>
  <Keyword>Ice Core Chemistry</Keyword>
  <Keyword>OPP-0126343</Keyword>
  <Keyword>Siple Dome</Keyword>
  <Keyword>WAIS</Keyword>
  <Keyword>West Antarctica</Keyword>
  <Sensor_Name>
    <Short_Name>AMS</Short_Name>
    <Long_Name>ACCELERATOR MASS SPECTROMETERS</Long_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>ION CHROMATOGRAPHS</Short_Name>
  </Sensor_Name>
  <Source_Name>
    <Short_Name>GROUND STATIONS</Short_Name>
  </Source_Name>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>100 kyBP</Paleo_Start_Date>
    <Paleo_Stop_Date>1997</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Data_Set_Progress>complete</Data_Set_Progress>
  <Spatial_Coverage>
    <Southernmost_Latitude>-81.6588</Southernmost_Latitude>
    <Northernmost_Latitude>-81.6588</Northernmost_Latitude>
    <Westernmost_Longitude>-148.812</Westernmost_Longitude>
    <Easternmost_Longitude>-148.812</Easternmost_Longitude>
  </Spatial_Coverage>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>ANTARCTICA</Location_Type>
    <Detailed_Location>SIPLE DOME</Detailed_Location>
  </Location>
  <Project>
    <Short_Name>NSF/OPP</Short_Name>
    <Long_Name>Office of Polar Programs, National Science Foundation</Long_Name>
  </Project>
  <Quality>These are preliminary data of cosmogenic radionuclides (10Be and 36Cl) in the Siple Dome A ice core. Depths are at variable intervals and are not continuous. Investigators have provided 36Cl/Cl ratios. Calculation of 36Cl concentration (atom/g) requires the Cl concentration in the same sample, which is not available. All 10Be results have more than 20% uncertainty due to accelerator mass spectrometry (AMS) calibration issues and the uncertainty in the volume of melting water; these require large corrections.</Quality>
  <Data_Set_Language>English</Data_Set_Language>
  <Originating_Center>NSIDC_AGDC</Originating_Center>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>NSIDC_AGDC</Short_Name>
      <Long_Name>NSIDC Antarctic Glaciological Data Center</Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>http://nsidc.org/agdc/</Data_Center_URL>
    <Personnel>
      <Role>Data Center Contact</Role>
      <First_Name>NSIDC AGDC</First_Name>
      <Last_Name>User Services</Last_Name>
      <Email>nsidc@nsidc.org</Email>
      <Phone>1 303 492-6199 </Phone>
      <Fax>1 303  492-2468 </Fax>
      <Contact_Address>
        <Address>National Snow and Ice Data Center</Address>
        <Address>CIRES, 449 UCB</Address>
        <Address>University of Colorado</Address>
        <City>Boulder</City>
        <Province_or_State>CO</Province_or_State>
        <Postal_Code>80309-0449</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>UC-BERKELEY/SSL</Short_Name>
      <Long_Name>Space Sciences Laboratory, University of California, Berkeley</Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>http://www.ssl.berkeley.edu/</Data_Center_URL>
    <Personnel>
      <Role>Data Center Contact</Role>
      <First_Name>K.</First_Name>
      <Last_Name>Nishiizumi</Last_Name>
      <Email>kuni@ssl.berkeley.edu</Email>
      <Phone>1 510 643-9361 </Phone>
      <Fax>1 510  643-7629 </Fax>
      <Contact_Address>
        <Address>7 Gauss Way</Address>
        <City>Berkeley</City>
        <Province_or_State>CA</Province_or_State>
        <Postal_Code>94720-7450</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Distribution>
    <Distribution_Media>FTP</Distribution_Media>
    <Distribution_Size>136 KB</Distribution_Size>
    <Distribution_Format>PDF</Distribution_Format>
  </Distribution>
  <Summary>This data set includes a  record of cosmogenic radionuclide concentrations in the Siple Dome A ice core collected as part of the West Antarctic ice core program. The investigators  measured profiles of both &lt;sup&gt;10&lt;/sup&gt;Be (half-life = 1.5x10&lt;sup&gt;6&lt;/sup&gt; years) and &lt;sup&gt;36&lt;/sup&gt;Cl (half-life = 3.0x10&lt;sup&gt;5&lt;/sup&gt; years) in the entire ice core, which spans the time period from the present to about 100,000 years before present. These data are being used for perfecting the ice core chronology, deducing the history of solar activity, deducing the history of variations in the geomagnetic field, and studying the possible role of solar variations on climate. 

Data are distributed as a PDF file and are available via FTP.</Summary>
  <Related_URL>
    <URL_Content_Type>
      <Type>VIEW RELATED INFORMATION</Type>
    </URL_Content_Type>
    <URL>http://nsidc.org/data/nsidc-0098.html</URL>
    <Description>Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole</Description>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>VIEW RELATED INFORMATION</Type>
    </URL_Content_Type>
    <URL>http://nsidc.org/data/nsidc-0134.html</URL>
    <Description>Siple Dome Highlights: Stable Isotopes</Description>
  </Related_URL>
  <IDN_Node>
    <Short_Name>AMD/US</Short_Name>
  </IDN_Node>
  <Metadata_Name>CEOS IDN DIF</Metadata_Name>
  <Metadata_Version>9.7</Metadata_Version>
  <DIF_Creation_Date>2007-05-31</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2013-03-18</Last_DIF_Revision_Date>
  <DIF_Revision_History> Added DOI</DIF_Revision_History>
</DIF>
