气候变化领域集成服务门户(CCPortal): Thermokarst lakes as a source of atmospheric CH4 during the last deglaciation

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DOI	10.1126/science.1142924
	Thermokarst lakes as a source of atmospheric CH4 during the last deglaciation
	Walter K.M.; Edwards M.E.; Grosse G.; Zimov S.A.; Chapin III F.S.
发表日期	2007
ISSN	0036-8075
起始页码	633
结束页码	636
卷号	318 期号:5850
英文摘要	Polar ice-core records suggest that an arctic or boreal source was responsible for more than 30% of the large increase in global atmospheric methane (CH4) concentration during deglacial climate warming; however, specific sources of that CH4 are still debated. Here we present an estimate of past CH4 flux during deglaciation from bubbling from thermokarst (thaw) lakes. Based on high rates of CH4 bubbling from contemporary arctic thermokarst lakes, high CH4 production potentials of organic matter from Pleistocene-aged frozen sediments, and estimates of the changing extent of these deposits as thermokarst lakes developed during deglaciation, we find that CH4 bubbling from newly forming thermokarst lakes comprised 33 to 87% of the high-latitude increase in atmospheric methane concentration and, in turn, contributed to the climate warming at the Pleistocene-Holocene transition.
英文关键词	methane; organic matter; global warming; Holocene; ice core; lacustrine environment; last deglaciation; methane; organic matter; Pleistocene; thermokarst; article; climate change; concentration (parameters); glacier; global climate; greenhouse effect; Holocene; lake; Pleistocene; polar ice cap; priority journal; sediment; thawing; thermokarst lake; warming
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/245941
作者单位	Water and Environmental Research Center, University of Alaska, Fairbanks, AK 99775, United States; International Arctic Research Center, University of Alaska, Fairbanks, AK 99775, United States; School of Geography, University of Southampton, United Kingdom; College of Natural Sciences, University of Alaska, Fairbanks, AK 99775, United States; Geophysical Institute, University of Alaska, Fairbanks, AK 99775, United States; Northeast Science Station, Pacific Institute for Geography, Russian Academy of Sciences, Russian Federation; Institute of Arctic Biology, University of Alaska, Fairbanks, AK 99775, United States
推荐引用方式 GB/T 7714	Walter K.M.,Edwards M.E.,Grosse G.,et al. Thermokarst lakes as a source of atmospheric CH4 during the last deglaciation[J],2007,318(5850).
APA	Walter K.M.,Edwards M.E.,Grosse G.,Zimov S.A.,&Chapin III F.S..(2007).Thermokarst lakes as a source of atmospheric CH4 during the last deglaciation.Science,318(5850).
MLA	Walter K.M.,et al."Thermokarst lakes as a source of atmospheric CH4 during the last deglaciation".Science 318.5850(2007).