The Nonlinear Optimal Triggering Perturbation of the Kuroshio Large Meander and Its Evolution in a Regional Ocean Model

doi:10.1175/JPO-D-17-0246.1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	The Nonlinear Optimal Triggering Perturbation of the Kuroshio Large Meander and Its Evolution in a Regional Ocean Model
	Liu, Xia 1,2; Mu, Mu 1,3; Wang, Qiang 1,4,5
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2018-08-01
卷号	48 期号:8 页码:1771-1786
关键词	North Pacific Ocean Nonlinear dynamics Forecasting techniques Primitive equations model Interdecadal variability
ISSN号	0022-3670
DOI	10.1175/JPO-D-17-0246.1
通讯作者	Wang, Qiang(wangqiang@qdio.ac.cn)
英文摘要	Based on the Regional Ocean Modeling System (ROMS) and the conditional nonlinear optimal perturbation (CNOP) method, we explore the nonlinear optimal triggering perturbation of the Kuroshio large meander (LM) and its evolution, and reveal the role of nonlinear physical processes in the formation of the LM path. The results show that the large amplitudes of the perturbations are mainly located in the upper 2000 m in the southeastern area of Kyushu (29 degrees-32 degrees N, 131 degrees-134 degrees E), where the eastward propagation of the cold anomaly is vital to the formation of the LM path. By analyzing the depth-integrated vorticity equation of the perturbation, we find that linear advection, namely, the interaction between the perturbation and the reference field, tends to move the cyclonic eddy induced by the optimal triggering perturbation eastward, while the nonlinear advection associated with the interaction of perturbations tends to move the cyclonic eddy westward. The opposing effects of the nonlinear advection and the linear advection slow the eastward movement of the cyclonic eddy so that the eddy has a chance to effectively develop, eventually leading to the formation of the Kuroshio LM path.
资助项目	National Natural Scientific Foundation of China[41230420] ; National Natural Scientific Foundation of China[41576015] ; Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0107] ; NSFC Innovative Group Grant[41421005] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1606402] ; National Programme on Global Change and Air-Sea Interaction[GASI-IPOVAI-06]
WOS研究方向	Oceanography
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000441232900001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/159661]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Wang, Qiang
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China 4.Chinese Acad Sci, Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xia,Mu, Mu,Wang, Qiang. The Nonlinear Optimal Triggering Perturbation of the Kuroshio Large Meander and Its Evolution in a Regional Ocean Model[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2018,48(8):1771-1786.
APA	Liu, Xia,Mu, Mu,&Wang, Qiang.(2018).The Nonlinear Optimal Triggering Perturbation of the Kuroshio Large Meander and Its Evolution in a Regional Ocean Model.JOURNAL OF PHYSICAL OCEANOGRAPHY,48(8),1771-1786.
MLA	Liu, Xia,et al."The Nonlinear Optimal Triggering Perturbation of the Kuroshio Large Meander and Its Evolution in a Regional Ocean Model".JOURNAL OF PHYSICAL OCEANOGRAPHY 48.8(2018):1771-1786.