Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap

doi:10.1175/JPO-D-12-05.1

IOCAS-IR > 海洋环流与波动重点实验室

	Nonlinear Dynamics of Two Western Boundary Currents Colliding at a Gap
	Wang, Zheng ; Yuan, Dongliang1,2 ; Yuan, DL (reprint author), Chinese Acad Sci, KLOCAW, Qingdao, Peoples R China.
	2012-11-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	42 期号:11 页码:2030-2040
文章类型	Article
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.
关键词	Driven Ocean Circulation Shallow-water Model Wind-driven Multiple Equilibria Double-gyre Munk Model Flows
学科领域	Oceanography
DOI	10.1175/JPO-D-12-05.1
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000311174300017
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/12173
专题	海洋环流与波动重点实验室
通讯作者	Yuan, DL (reprint author), Chinese Acad Sci, KLOCAW, Qingdao, Peoples R China.
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,Yuan, DL . 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,&Yuan, DL .(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.

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