气候变化领域集成服务门户(CCPortal): Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor

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DOI	10.1126/science.aal4500
	Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor
	Andreassen K.; Hubbard A.; Winsborrow M.; Patton H.; Vadakkepuliyambatta S.; Plaza-Faverola A.; Gudlaugsson E.; Serov P.; Deryabin A.; Mattingsdal R.; Mienert J.; Bünz S.
发表日期	2017
ISSN	0036-8075
起始页码	948
结束页码	953
卷号	356 期号:6341
英文摘要	Widespread methane release from thawing Arctic gas hydrates is a major concern, yet the processes, sources, and fluxes involved remain unconstrained. We present geophysical data documenting a cluster of kilometer-wide craters and mounds from the Barents Sea floor associated with large-scale methane expulsion. Combined with ice sheet/gas hydrate modeling, our results indicate that during glaciation, natural gas migrated from underlying hydrocarbon reservoirs and was sequestered extensively as subglacial gas hydrates. Upon ice sheet retreat, methane from this hydrate reservoir concentrated in massive mounds before being abruptly released to form craters. We propose that these processes were likely widespread across past glaciated petroleum provinces and that they also provide an analog for the potential future destabilization of subglacial gas hydrate reservoirs beneath contemporary ice sheets. Copyright 2016 by the American Association for the Advancement of Science; all rights reserved.
英文关键词	hydrocarbon; methane; natural gas; petroleum; blowout; crater; fluid expulsion; gas hydrate; geophysical survey; hydrocarbon reservoir; ice sheet; methane; natural gas; petroleum; seafloor; sequestration (chemistry); subglacial environment; thawing; Arctic; Article; dissociation; glaciation; ice sheet; iceberg; priority journal; sea; sea level; sea level rise; sediment; Arctic; climate change; geographic and geological phenomena; ice cover; sea; theoretical model; Arctic; Arctic Ocean; Barents Sea; Arctic Regions; Climate Change; Geological Phenomena; Ice Cover; Methane; Models, Theoretical; Oceans and Seas
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/242844
作者单位	Centre for Arctic Gas Hydrate, Environment and Climate (CAGE), Department of Geosciences, UiT the Arctic University of Norway, Tromsø, N-9037, Norway; Norwegian Petroleum Direct., Harstad, Norway
推荐引用方式 GB/T 7714	Andreassen K.,Hubbard A.,Winsborrow M.,et al. Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor[J],2017,356(6341).
APA	Andreassen K..,Hubbard A..,Winsborrow M..,Patton H..,Vadakkepuliyambatta S..,...&Bünz S..(2017).Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor.Science,356(6341).
MLA	Andreassen K.,et al."Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor".Science 356.6341(2017).