<?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-0509</Entry_ID>
  <Entry_Title>Methane Concentrations from the WAIS Divide Ice Core (WDC06A), 60 to 11,300 ybp</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Todd Sowers</Dataset_Creator>
    <Dataset_Title>Methane Concentrations from the WAIS Divide Ice Core (WDC06A), 60 to 11,300 ybp</Dataset_Title>
    <Dataset_Release_Date>2012-04-19</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-0509.html</Online_Resource>
    <Dataset_DOI>http://dx.doi.org/10.7265/N5J1013R</Dataset_DOI>
  </Data_Set_Citation>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>Todd</First_Name>
    <Middle_Name>A.</Middle_Name>
    <Last_Name>Sowers</Last_Name>
    <Email>tas11@psu.edu</Email>
    <Phone>1 814 865-1921 </Phone>
    <Contact_Address>
      <Address>Penn State University</Address>
      <Address>Earth and Environment Science Institute</Address>
      <Address>317b Earth and Engineering Science Building</Address>
      <City>University Park</City>
      <Province_or_State>PA</Province_or_State>
      <Postal_Code>16802</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>Ice Depth/Thickness</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Paleoclimate</Topic>
    <Term>Ice Core Records</Term>
    <Variable_Level_1>Methane</Variable_Level_1>
  </Parameters>
  <ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category>
  <Keyword>AGDC</Keyword>
  <Keyword>Antarctica</Keyword>
  <Keyword>Methane</Keyword>
  <Keyword>WAIS</Keyword>
  <Keyword>WAIS Divide</Keyword>
  <Keyword>West Antarctica</Keyword>
  <Sensor_Name>
    <Short_Name>GAS CHROMATOGRAPHS</Short_Name>
  </Sensor_Name>
  <Source_Name>
    <Short_Name>GROUND-BASED OBSERVATIONS</Short_Name>
  </Source_Name>
  <Temporal_Coverage>
    <Start_Date>2010-01-01</Start_Date>
    <Stop_Date>2010-12-31</Stop_Date>
  </Temporal_Coverage>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>11300</Paleo_Start_Date>
    <Paleo_Stop_Date>60</Paleo_Stop_Date>
    <Chronostratigraphic_Unit>
      <Eon>Phanerozoic</Eon>
      <Era>Cenozoic</Era>
      <Period>Quaternary</Period>
      <Epoch>Holocene</Epoch>
      <Stage>Holocene</Stage>
    </Chronostratigraphic_Unit>
  </Paleo_Temporal_Coverage>
  <Data_Set_Progress>complete</Data_Set_Progress>
  <Spatial_Coverage>
    <Southernmost_Latitude>-79.46763</Southernmost_Latitude>
    <Northernmost_Latitude>-79.46763</Northernmost_Latitude>
    <Westernmost_Longitude>-112.086483</Westernmost_Longitude>
    <Easternmost_Longitude>-112.086483</Easternmost_Longitude>
    <Minimum_Depth>91.48 meters</Minimum_Depth>
    <Maximum_Depth>1948.3 meters</Maximum_Depth>
  </Spatial_Coverage>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>ANTARCTICA</Location_Type>
    <Detailed_Location>WEST ANTARCTIC ICE SHEET DIVIDE</Detailed_Location>
  </Location>
  <Data_Set_Language>English</Data_Set_Language>
  <Originating_Center>NSIDC_AGDC</Originating_Center>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>NSIDC</Short_Name>
      <Long_Name>National Snow and Ice Data Center</Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>http://nsidc.org</Data_Center_URL>
    <Personnel>
      <Role>Data Center Contact</Role>
      <First_Name>NSIDC</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>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>
  <Distribution>
    <Distribution_Media>FTP</Distribution_Media>
    <Distribution_Size>52 KB</Distribution_Size>
    <Distribution_Format>Microsoft Excel</Distribution_Format>
  </Distribution>
  <Reference>Sowers, T. 2010. Atmospheric Methane Isotope Records Covering the Holocene Period. Quaternary Science Reviews 29, doi:10.1016/j.quascirev.2009.05.023</Reference>
  <Summary>This data set contains a high-resolution history of atmospheric methane (CH4) concentrations in parts per billion (ppb) from approximately 60 to 11,300 years before present (ybp), obtained in 2010 from the West Antarctic Ice Sheet (WAIS) Divide Ice Core WDC06A. Gas age is derived from the WDC06A-5 ice age scale.

Data are available via FTP as a Microsoft Excel file (.xlsx).</Summary>
  <Metadata_Name>CEOS IDN DIF</Metadata_Name>
  <Metadata_Version>9.7</Metadata_Version>
  <DIF_Creation_Date>2012-04-19</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2013-03-20</Last_DIF_Revision_Date>
  <DIF_Revision_History> Added DOI</DIF_Revision_History>
</DIF>
