<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<metadata>
  <idinfo>
    <datsetid>NSIDC-0501</datsetid>
    <citation>
      <citeinfo>
        <origin>MacGregor, J., K. Matsuoka, and M. Studinger</origin>
        <pubdate>20110815</pubdate>
        <title>Modeled Radar Attenuation Rate Profile at the Vostok 5G Ice Core Site, Antarctica</title>
        <pubinfo>
          <pubplace>Boulder, Colorado USA</pubplace>
          <publish>NSIDC: National Snow and Ice Data Center</publish>
        </pubinfo>
        <onlink>http://nsidc.org/data/nsidc-0501.html</onlink>
        <onlink>http://dx.doi.org/10.7265/N59K485D</onlink>
      </citeinfo>
    </citation>
    <descript>
      <abstract>This data set provides a modeled radar attenuation rate profile, showing the predicted contributions from pure ice and impurities to radar attenuation at the Vostok 5G ice core site in Antarctica, as well as the total attenuation rate and its formal uncertainty. The model data are based on borehole temperature logs, concentrations of major soluble ions measured from melted ice core samples, and information about the electrical conductivity of ice. Attenuation rates and their spatial variability are important constraints for radar studies of ice sheets. Parameters include depth, total attenuation rate, and attenuation rate contribution from pure ice, acidity, and salinity.

Data are available via FTP as a text file (.txt) with columns in comma separated value format.</abstract>
      <purpose>scientific research</purpose>
      <documnts>
        <userguid>
          <citeinfo>
            <origin>MacGregor, J., K. Matsuoka, and M. Studinger</origin>
            <pubdate>20110815</pubdate>
            <title>Modeled Radar Attenuation Rate Profile at the Vostok 5G Ice Core Site, Antarctica</title>
            <pubinfo>
              <pubplace>Boulder, Colorado USA</pubplace>
              <publish>NSIDC: National Snow and Ice Data Center</publish>
            </pubinfo>
            <onlink>http://nsidc.org/data/docs/agdc/nsidc0501_macgregor1/index.html</onlink>
          </citeinfo>
        </userguid>
      </documnts>
    </descript>
    <timeperd>
      <timeinfo>
        <rngdates>
          <begdate>20070101</begdate>
          <enddate>20081231</enddate>
        </rngdates>
      </timeinfo>
      <current>publication date</current>
    </timeperd>
    <status>
      <progress>Complete</progress>
      <update>Unknown</update>
    </status>
    <spdom>
      <bounding>
        <westbc>73.17</westbc>
        <eastbc>73.17</eastbc>
        <northbc>-78.47</northbc>
        <southbc>-78.47</southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>NASA Global Change Master Directory (GCMD) Science Keywords</themekt>
        <themekey>EARTH SCIENCE &gt; Atmosphere &gt; Precipitation &gt; Snow</themekey>
        <themekey>EARTH SCIENCE &gt; Terrestrial Hydrosphere &gt; Glaciers/Ice Sheets &gt; Ice Sheets</themekey>
      </theme>
      <theme>
        <themekt>None</themekt>
        <themekey/>
      </theme>
      <theme>
        <themekt>NASA Global Change Master Directory (GCMD) Instrument Keywords</themekt>
        <themekey>ION CHROMATOGRAPHS</themekey>
        <themekey>THERMOMETERS</themekey>
      </theme>
      <theme>
        <themekt>NASA Global Change Master Directory (GCMD) Platform Keywords</themekt>
        <themekey>FIELD INVESTIGATION</themekey>
        <themekey>FIELD SURVEYS</themekey>
        <themekey>MODELS</themekey>
      </theme>
      <theme>
        <themekt>ISO 19115 Topic Categories</themekt>
        <themekey>climatologyMeteorologyAtmosphere</themekey>
      </theme>
      <theme>
        <themekt>None</themekt>
        <themekey>Airborne Radar Sounding</themekey>
        <themekey>Antarctic Ice Sheet</themekey>
        <themekey>Ice Penetrating Radar</themekey>
        <themekey>Ice Sheet</themekey>
        <themekey>Lake Vostok</themekey>
        <themekey>Model</themekey>
        <themekey>Modeling</themekey>
        <themekey>MODEL OUTPUT</themekey>
        <themekey>MODELS</themekey>
      </theme>
      <place>
        <placekt>NASA Global Change Master Directory (GCMD) Location Keywords</placekt>
        <placekey>Continent &gt; Antarctica</placekey>
        <placekey>Geographic Region &gt; Polar</placekey>
      </place>
    </keywords>
    <thelayid>
      <numthlay>2</numthlay>
      <layrname>
        <theme>
          <themekt>NASA Global Change Master Directory (GCMD) Science Keywords</themekt>
          <themekey>EARTH SCIENCE &gt; Atmosphere &gt; Precipitation &gt; Snow</themekey>
        </theme>
      </layrname>
      <layrname>
        <theme>
          <themekt>NASA Global Change Master Directory (GCMD) Science Keywords</themekt>
          <themekey>EARTH SCIENCE &gt; Terrestrial Hydrosphere &gt; Glaciers/Ice Sheets &gt; Ice Sheets</themekey>
        </theme>
      </layrname>
    </thelayid>
    <accconst>None</accconst>
    <useconst>None</useconst>
    <ptcontac>
      <cntinfo>
        <cntperp>
          <cntper>NSIDC User Services</cntper>
          <cntorg>National Snow and Ice Data Center</cntorg>
        </cntperp>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>CIRES, 449 UCB</address>
          <address>University of Colorado</address>
          <city>Boulder</city>
          <state>CO</state>
          <postal>80309-0449</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 303 492-6199 x</cntvoice>
        <cntfax>1 303  492-2468 x</cntfax>
        <cntemail>nsidc@nsidc.org</cntemail>
      </cntinfo>
    </ptcontac>
  </idinfo>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>National Snow and Ice Data Center</cntorg>
          <cntper>NSIDC User Services</cntper>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>National Snow and Ice Data Center</address>
          <address>CIRES, 449 UCB</address>
          <address>University of Colorado</address>
          <city>Boulder</city>
          <state>CO</state>
          <postal>80309-0449</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 303 492-6199 </cntvoice>
        <cntfax>1 303  492-2468 </cntfax>
        <cntemail>nsidc@nsidc.org</cntemail>
      </cntinfo>
    </distrib>
    <resdesc>NSIDC-0501</resdesc>
    <distliab>NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.</distliab>
    <stdorder>
      <digform>
        <digtinfo>
          <formname>ASCII Text</formname>
        </digtinfo>
        <digtopt>
          <onlinopt>
            <computer>
              <networka>
                <networkr>ftp://sidads.colorado.edu/pub/DATASETS/AGDC/nsidc0501_macgregor_V01/</networkr>
              </networka>
            </computer>
          </onlinopt>
        </digtopt>
      </digform>
      <fees>None</fees>
    </stdorder>
  </distinfo>
  <metainfo>
    <metd>20130320</metd>
    <metrd>20130320</metrd>
    <metc>
      <cntinfo>
        <cntperp>
          <cntper>NSIDC User Services</cntper>
          <cntorg>National Snow and Ice Data Center</cntorg>
        </cntperp>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>National Snow and Ice Data Center</address>
          <address>CIRES, 449 UCB</address>
          <address>University of Colorado</address>
          <city>Boulder</city>
          <state>CO</state>
          <postal>80309-0449</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 303 492-6199 </cntvoice>
        <cntfax>1 303  492-2468 </cntfax>
        <cntemail>nsidc@nsidc.org</cntemail>
      </cntinfo>
    </metc>
    <metstdn>FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata</metstdn>
    <metstdv>FGDC-STD-012-2002</metstdv>
  </metainfo>
</metadata>
