气候变化领域集成服务门户(CCPortal): Basin-Width Dependence of Northern Deep Convection

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DOI	10.1029/2020GL089135
	Basin-Width Dependence of Northern Deep Convection
	Youngs M.K.; Ferrari R.; Flierl G.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	Convection penetrates to the ocean bottom in the North Atlantic but not in the North Pacific. This study examines the role of basin width in shutting down high-latitude ocean convection. Deep convection is triggered by polar cooling, but it is opposed by precipitation. A two-layer analytical model illustrates that the overturning circulation acts to mitigate the effect of precipitation by advecting salty, dense water from subtropical latitudes to polar latitudes. The nonlinear dependence of the overturning strength on basin width makes it more efficient in a narrow basin, resulting in a convection shutdown at a stronger freshwater forcing. These predictions are confirmed by simulations with a general circulation model configured with a single closed basin to the north and a reentrant channel to the south. This suggests that basin width may play a role in suppressing convection in the North Pacific but not in the North Atlantic. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Natural convection; Deep convection; General circulation model; High Latitudes; Nonlinear dependence; Ocean convection; Overturning circulation; Polar latitude; Subtropical latitudes; Oceanography; advection; air-sea interaction; analytical method; atmospheric convection; cooling; freshwater input; general circulation model; precipitation (climatology); subtropical region; Atlantic Ocean; Atlantic Ocean (North); Pacific Ocean; Pacific Ocean (North)
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/169985
作者单位	Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Physical Oceanography, Woods Hole Oceanographic Institution, Falmouth, MA, United States
推荐引用方式 GB/T 7714	Youngs M.K.,Ferrari R.,Flierl G.R.. Basin-Width Dependence of Northern Deep Convection[J],2020,47(15).
APA	Youngs M.K.,Ferrari R.,&Flierl G.R..(2020).Basin-Width Dependence of Northern Deep Convection.Geophysical Research Letters,47(15).
MLA	Youngs M.K.,et al."Basin-Width Dependence of Northern Deep Convection".Geophysical Research Letters 47.15(2020).