Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap

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	Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap
	Wang, Zheng ; Yuan, Dongliang1,2
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2012-11-01
卷号	42 期号:11 页码:2030-2040
关键词	DRIVEN OCEAN CIRCULATION SHALLOW-WATER MODEL WIND-DRIVEN MULTIPLE EQUILIBRIA DOUBLE-GYRE MUNK MODEL FLOWS
ISSN号	0022-3670
通讯作者	Yuan, DL (reprint author), Chinese Acad Sci, KLOCAW, Qingdao, Peoples R China.
英文摘要	The nonlinear collision of two western boundary currents (WBCs) of equal transport at a gap of the western boundary is studied using a 1.5-layer reduced-gravity quasigeostrophic ocean model. It is found that, when the gap (of width 2a) is narrow, a <= 7.3L(M) (L-M the Munk thickness), neither of the WBCs can penetrate into the western basin because of the restriction of the viscous force. When 7.3L(M) < a < 9.0L(M), both WBCs penetrate into the western basin for small transport and choke for large transport. When 9.0L(M) <= a <= 9.6L(M), the two WBCs penetrate for small transport, choke for intermediate transport, and shed eddies periodically for large transport. When a > 9.6L(M), no steady choking state is found. Instead, the WBCs have only two equilibrium states: the penetrating and the periodic eddy shedding states. A Hopf bifurcation is found for a > 9.0L(M). The Reynolds number (Re) of the Hopf bifurcation is sensitive to the magnitude of gamma(a/L-M) and the baroclinic deformation radius, being small for larger gamma or deformation radius. In addition, a reverse Hopf bifurcations is identified in the decreased Re experiments, occurring at a smaller Re than that of the Hopf bifurcation. The Re of the reverse Hopf bifurcation is not sensitive to the magnitude of the baroclinic deformation radius.
学科主题	Oceanography
收录类别	SCI
原文出处	10.1175/JPO-D-12-05.1
语种	英语
WOS记录号	WOS:000311174300017
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/12173]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, KLOCAW, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zheng,Yuan, Dongliang. Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2012,42(11):2030-2040.
APA	Wang, Zheng,&Yuan, Dongliang.(2012).Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap.JOURNAL OF PHYSICAL OCEANOGRAPHY,42(11),2030-2040.
MLA	Wang, Zheng,et al."Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap".JOURNAL OF PHYSICAL OCEANOGRAPHY 42.11(2012):2030-2040.