气候变化领域集成服务门户(CCPortal): Dynamics of Deep Ocean Eastern Boundary Currents

CCPortal

DOI	10.1029/2019GL085396
	Dynamics of Deep Ocean Eastern Boundary Currents
	Yang X.; Tziperman E.; Speer K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	The long-standing paradigm for the large-scale time-averaged ocean circulation in the world oceans includes intensified currents at the western boundary, and a much slower interior flow elsewhere. However, poleward deep boundary currents in the eastern limits of the deep South Pacific, Atlantic, and Indian Oceans have been observed repeatedly at 2- to 4-km depth. They carry up to a third of the total deep ocean transports, implying a significant role in climate, yet their dynamics are still not well understood. Here we develop a theoretical understanding for these currents, using a hierarchy of realistic and idealized models, focusing on the South Pacific Ocean. The deep eastern boundary current there is shown to be driven by a traditional interior balance together with a narrow boundary layer scale near the eastern boundary, which exists only when stratification and topography are both included. A simplified semianalytical vorticity model is developed for the deep eastern boundary current. © 2019. American Geophysical Union. All Rights Reserved.
英文关键词	Boundary layers; Topography; Boundary currents; Eastern boundary current; Idealized models; Ocean circulation; Semi-analytical; South pacific oceans; Time-averaged; Western boundary; Ocean currents; boundary layer; deep sea; eastern boundary current; oceanic circulation; stratification; theoretical study; topography; Atlantic Ocean; Pacific Ocean; Pacific Ocean (South)
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/170847
作者单位	Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Department of Earth and Planetary Sciences and School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Geophysical Fluid Dynamics Institute and the Department of Earth, Ocean, and Atmospheric Sciences, Florida State University, Tallahassee, FL, United States
推荐引用方式 GB/T 7714	Yang X.,Tziperman E.,Speer K.. Dynamics of Deep Ocean Eastern Boundary Currents[J],2020,47(1).
APA	Yang X.,Tziperman E.,&Speer K..(2020).Dynamics of Deep Ocean Eastern Boundary Currents.Geophysical Research Letters,47(1).
MLA	Yang X.,et al."Dynamics of Deep Ocean Eastern Boundary Currents".Geophysical Research Letters 47.1(2020).