气候变化领域集成服务门户(CCPortal): The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release

CCPortal

DOI	10.1029/2019GL084561
	The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release
	Dupré S.; Loubrieu B.; Pierre C.; Scalabrin C.; Guérin C.; Ehrhold A.; Ogor A.; Gautier E.; Ruffine L.; Biville R.; Saout J.; Breton C.; Floodpage J.; Lescanne M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	A few thousand (2,612) seeps are releasing microbial methane bubbles from the seafloor at the Aquitaine Shelf edge (Bay of Biscay) at shallow water depths (140–220 m). This methane contributes to the formation of meter-scale subcircular carbonate structures, which are (sub)outcropping over 375 km2. Based on in situ flow rate measurements and acoustic data, and assuming steady and continuous fluxes over time, the methane entering the water column is estimated at 144 Mg/yr. Microbial methane circulation has been ongoing for at least a few thousand years. This discovery highlights the importance of microbial methane generation, disconnected from deep thermogenic sources and gas hydrates, at continental shelves. The shelf edge may be viewed as a focus area for methane circulation and release and related diagenesis, all having an impact on the shaping of continental shelves and potentially on the oceanic and atmospheric carbon budget. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Budget control; Flow rate; Methane; Atmospheric carbon; Bay of Biscay; Continental shelves; Continuous flux; Flow rate measurements; Methane release; Shallow water depths; Water columns; Gas hydrates; atmosphere-ocean coupling; carbon budget; continental shelf; gas hydrate; hydrocarbon seep; methane; microbial activity; seafloor; shallow water; shelf break; water column; water depth; Aquitaine; Atlantic Ocean; Bay of Biscay; France; Nouvelle-Aquitaine
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170484
作者单位	IFREMER, Unité Géosciences Marines, Plouzané, France; LOCEAN/IPSL, CNRS-IRD-MNHN-Sorbonne Université, 4 place Jussieu, Paris, France; ECCO, 1 rue de Grenoble, Maisons Alfort, France; TOTAL SA, Centre scientifique et technique Jean-Féger, avenue Larribau, Pau, France
推荐引用方式 GB/T 7714	Dupré S.,Loubrieu B.,Pierre C.,et al. The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release[J],2020,47(7).
APA	Dupré S..,Loubrieu B..,Pierre C..,Scalabrin C..,Guérin C..,...&Lescanne M..(2020).The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release.Geophysical Research Letters,47(7).
MLA	Dupré S.,et al."The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release".Geophysical Research Letters 47.7(2020).