气候变化领域集成服务门户(CCPortal): Hydrogen isotopes preclude marine hydrate CH4 emissions at the onset of dansgaard-oeschger events

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DOI	10.1126/science.1187651
	Hydrogen isotopes preclude marine hydrate CH4 emissions at the onset of dansgaard-oeschger events
	Bock M.; Schmitt J.; Möller L.; Spahni R.; Blunier T.; Fischer H.
发表日期	2010
ISSN	0036-8075
起始页码	1686
结束页码	1689
卷号	328 期号:5986
英文摘要	The causes of past changes in the global methane cycle and especially the role of marine methane hydrate (clathrate) destabilization events are a matter of debate. Here we present evidence from the North Greenland Ice Core Project ice core based on the hydrogen isotopic composition of methane [δD(CH 4)] that clathrates did not cause atmospheric methane concentration to rise at the onset of Dansgaard-Oeschger (DO) events 7 and 8. Box modeling supports boreal wetland emissions as the most likely explanation for the interstadial increase. Moreover, our data show that δD(CH4) dropped 500 years before the onset of DO 8, with CH4 concentration rising only slightly. This can be explained by an early climate response of boreal wetlands, which carry the strongly depleted isotopic signature of high-latitude precipitation at that time.
英文关键词	hydrogen; methane; Dansgaard-Oeschger cycle; hydrogen isotope; interstadial; isotopic composition; marine environment; methane; NorthGRIP; paleoatmosphere; paleoclimate; article; climate change; glaciation; Greenland; kinetics; priority journal; temperature
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/243075
作者单位	Climate and Environmental Physics, Physics Institute and Oeschger Centre for Climate Change Research, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland; Alfred Wegener Institute for Polar and Marine Research, Am alten Hafen 26, 27568 Bremerhaven, Germany; Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen ø, Denmark
推荐引用方式 GB/T 7714	Bock M.,Schmitt J.,Möller L.,et al. Hydrogen isotopes preclude marine hydrate CH4 emissions at the onset of dansgaard-oeschger events[J],2010,328(5986).
APA	Bock M.,Schmitt J.,Möller L.,Spahni R.,Blunier T.,&Fischer H..(2010).Hydrogen isotopes preclude marine hydrate CH4 emissions at the onset of dansgaard-oeschger events.Science,328(5986).
MLA	Bock M.,et al."Hydrogen isotopes preclude marine hydrate CH4 emissions at the onset of dansgaard-oeschger events".Science 328.5986(2010).