| Late Quaternary atmospheric CH4 isotope record suggests marine clathrates are stable. | |
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MedLine Citation:
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PMID: 16469923 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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One explanation for the abrupt increases in atmospheric CH4, that occurred repeatedly during the last glacial cycle involves clathrate destabalization events. Because marine clathrates have a distinct deuterium/hydrogen (D/H) isotope ratio, any such destabilization event should cause the D/H ratio of atmospheric CH4 (deltaD(CH4)) to increase. Analyses of air trapped in the ice from the second Greenland ice sheet project show stable and/or decreasing deltaD(CH4) values during the end of the Younger and Older Dryas periods and one stadial period, suggesting that marine clathrates were stable during these abrupt warming episodes. Elevated glacial deltaD(CH4) values may be the result of a lower ratio of net to gross wetland CH4 emissions and an increase in petroleum-based emissions. |
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Authors:
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Todd Sowers |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Science (New York, N.Y.) Volume: 311 ISSN: 1095-9203 ISO Abbreviation: Science Publication Date: 2006 Feb |
Date Detail:
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Created Date: 2006-02-10 Completed Date: 2006-02-17 Revised Date: 2007-03-19 |
Medline Journal Info:
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Nlm Unique ID: 0404511 Medline TA: Science Country: United States |
Other Details:
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Languages: eng Pagination: 838-40 Citation Subset: - |
Affiliation:
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Department of Geosciences and the Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA. sowers@geosc.psu.edu |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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