气候变化领域集成服务门户(CCPortal): Atlantic Deep Water Formation Occurs Primarily in the Iceland Basin and Irminger Sea by Local Buoyancy Forcing

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DOI	10.1029/2020GL091028
	Atlantic Deep Water Formation Occurs Primarily in the Iceland Basin and Irminger Sea by Local Buoyancy Forcing
	Petit T.; Lozier M.S.; Josey S.A.; Cunningham S.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	The Atlantic Meridional Overturning Circulation (AMOC), a key mechanism in the climate system, delivers warm and salty waters from the subtropical gyre to the subpolar gyre and Nordic Seas, where they are transformed into denser waters flowing southward in the lower AMOC limb. The prevailing hypothesis is that dense waters formed in the Labrador and Nordic Seas are the sources for the AMOC lower limb. However, recent observations reveal that convection in the Labrador Sea contributes minimally to the total overturning of the subpolar gyre. In this study, we show that the AMOC is instead primarily composed of waters formed in the Nordic Seas and Irminger and Iceland basins. A first direct estimate of heat and freshwater fluxes over these basins demonstrates that buoyancy forcing during the winter months can almost wholly account for the dense waters of the subpolar North Atlantic that are exported as part of the AMOC. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Buoyancy; Stream flow; Atlantic meridional overturning circulations; Buoyancy forcing; Climate system; Deep-water formation; Heat and freshwater fluxes; Subpolar gyres; Subpolar North Atlantic; Subtropical Gyre; Oceanography; buoyancy forcing; climate change; deep water formation; freshwater input; meridional circulation; oceanic convection; sea surface salinity; Arctic Ocean; Atlantic Ocean; Atlantic Ocean (North); Iceland Basin; Irminger Sea; Labrador Sea; Norwegian Sea
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/169414
作者单位	School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; National Oceanography Centre, Southampton, United Kingdom; Scottish Association for Marine Science, Oban, United Kingdom
推荐引用方式 GB/T 7714	Petit T.,Lozier M.S.,Josey S.A.,et al. Atlantic Deep Water Formation Occurs Primarily in the Iceland Basin and Irminger Sea by Local Buoyancy Forcing[J],2020,47(22).
APA	Petit T.,Lozier M.S.,Josey S.A.,&Cunningham S.A..(2020).Atlantic Deep Water Formation Occurs Primarily in the Iceland Basin and Irminger Sea by Local Buoyancy Forcing.Geophysical Research Letters,47(22).
MLA	Petit T.,et al."Atlantic Deep Water Formation Occurs Primarily in the Iceland Basin and Irminger Sea by Local Buoyancy Forcing".Geophysical Research Letters 47.22(2020).