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

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	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
	2018-08-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	48 期号:8 页码:1771-1786
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.
关键词	North Pacific Ocean Nonlinear dynamics Forecasting techniques Primitive equations model Interdecadal variability
DOI	10.1175/JPO-D-17-0246.1
关键词[WOS]	CIRCULATION MODEL ; OPTIMAL PRECURSOR ; GULF-STREAM ; PART I ; PATH ; SOUTH ; JAPAN ; TOPOGRAPHY ; SYSTEM ; PREDICTABILITY
语种	英语
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
项目资助者	National Natural Scientific Foundation of China ; Qingdao National Laboratory for Marine Science and Technology ; NSFC Innovative Group Grant ; NSFC-Shandong Joint Fund for Marine Science Research Centers ; National Programme on Global Change and Air-Sea Interaction
WOS类目	Oceanography
WOS记录号	WOS:000441232900001
出版者	AMER METEOROLOGICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/12329
专题	中国科学院青岛生物能源与过程研究所
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.