气候变化领域集成服务门户(CCPortal): 14CH4 measurements in Greenland Ice: Investigating last glacial termination CH4 sources

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DOI	10.1126/science.1168909
	14CH4 measurements in Greenland Ice: Investigating last glacial termination CH4 sources
	Petrenko V.V.; Smith A.M.; Brook E.J.; Lowe D.; Riedel K.; Brailsford G.; Hua Q.; Schaefer H.; Reeh N.; Weiss R.F.; Etheridge D.; Severinghaus J.P.
发表日期	2009
ISSN	0036-8075
起始页码	506
结束页码	508
卷号	324 期号:5926
英文摘要	The cause of a large increase of atmospheric methane concentration during the Younger Dryas-Preboreal abrupt climatic transition (̃11,600 years ago) has been the subject of much debate. The carbon-14 (14C) content of methane (14CH4) should distinguish between wetland and clathrate contributions to this increase. We present measurements of 14CH4 in glacial ice, targeting this transition, performed by using ice samples obtained from an ablation site in west Greenland. Measured 14CH4 values were higher than predicted under any scenario. Sample 14CH4 appears to be elevated by direct cosmogenic 14C production in ice. 14C of CO was measured to better understand this process and correct the sample 14CH4. Corrected results suggest that wetland sources were likely responsible for the majority of the Younger Dryas-Preboreal CH4 rise.
英文关键词	ice; methane; clathrate; climate change; Last Glacial; methane; paleoclimate; Preboreal; wetland; Younger Dryas; article; astronomy; atmosphere; climate change; continental ice; glaciation; glacier; Greenland; priority journal; transition temperature; wetland; Arctic; Greenland; Greenland Ice Sheet
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245068
作者单位	Scripps Institution of Oceanography, University of California, San Diego, CA 92093, United States; Australian Nuclear Science and Technology Organisation (ANSTO), Private Mail Box 1, Menai, NSW 2234, Australia; Department of Geosciences, Oregon State University, Corvallis, OR 97331, United States; National Institute of Water and Atmospheric Research Ltd., Post Office Box 14901, Kilbirnie, 301 Evans Bay Parade, Wellington, New Zealand; DTU Space, National Space Institute, Technical University of Denmark Ørsteds Plads, DK-2800 Kongens Lyngby, Denmark; Commonwealth Scientific and Industrial Research Organisation, Marine and Atmospheric Research, Private Mail Box 1, Aspendale, VIC 3195, Australia; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, United States
推荐引用方式 GB/T 7714	Petrenko V.V.,Smith A.M.,Brook E.J.,et al. 14CH4 measurements in Greenland Ice: Investigating last glacial termination CH4 sources[J],2009,324(5926).
APA	Petrenko V.V..,Smith A.M..,Brook E.J..,Lowe D..,Riedel K..,...&Severinghaus J.P..(2009).14CH4 measurements in Greenland Ice: Investigating last glacial termination CH4 sources.Science,324(5926).
MLA	Petrenko V.V.,et al."14CH4 measurements in Greenland Ice: Investigating last glacial termination CH4 sources".Science 324.5926(2009).