<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Keith A. Kvenvolden</dc:contributor>
  <dc:contributor>Peter W. Barnes</dc:contributor>
  <dc:contributor>Brian N. Popp</dc:contributor>
  <dc:contributor>Frank J. Sansone</dc:contributor>
  <dc:contributor>Terri M. Rust</dc:contributor>
  <dc:contributor>Marvin D. Lilley</dc:contributor>
  <dc:contributor>Eric J. Olson</dc:contributor>
  <dc:creator>Thomas D. Lorenson</dc:creator>
  <dc:date>1995</dc:date>
  <dc:description>&lt;p&gt;We are engaged in a five-year study to test the hypothesis that methane from decomposing gas hydrates may contribute methane to the atmosphere. The release of methane, a "greenhouse" gas, can enhance global warming and be a factor in global climate change.&amp;nbsp;&lt;/p&gt;&lt;p&gt;As part of the study we have measured the methane concentration in the water column of the Beaufort Sea shelf out to water depths of 90 meters from 1992-1995. In 1994 the carbon isotopic composition of methane in seawater of the Beaufort Sea shelf from Cape Halkett to Mikkelsen Bay (total water depths from 3 to 56 m) was measured by gas chromatography-isotope-ratio mass spectrometry in an effort to define the source of methane. Concentrations of methane in water samples used for isotopic analysis ranged from 5.4 to 275 nM.&amp;nbsp;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/ofr95669</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Maps showing isotopic composition of methane in seawater of the Alaskan Beaufort Sea, 1994</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>