Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model

IOCAS-IR

	Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model
	Zhang PJ(张培军); Wang Q(王强); Ma LB(马利斌)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2015-01-15
出版年	2015
卷号	v.33 期号:01 页码:254-263
文献类型	CNKI期刊论文
摘要	Based on a barotropic inflow-outflow model,we examine the formation of the Kuroshio large meander(LM) using conditional nonlinear optimal perturbation(CNOP) method.Both linear and nonlinear evolutions of such perturbations obtained by this method are investigated.The results show that the nonlinear evolution can result in the Kuroshio transition from a straight to LM path,whereas the linear evolution cannot.This implies that nonlinearity plays an important role in the formation of the Kuroshio LM path.The nonlinearity exists as advection in the evolution equations of the perturbation derived from the barotropic inflow-outflow model,namely the nonlinear advection of the perturbation by the perturbation(NAPP).By examining the role of this nonlinearity,we find that the NAPP tends to move the cyclonic eddy induced by the CNOP-type perturbation westward.Together with the beta effect,this offsets part of the eastward advection caused by the interaction between the perturbation and the background flow.Hence,the eastward movement of the cyclonic eddy is significantly weakened,effectively causing the eddy to develop.The sufficient evolution of this cyclonic eddy leads to the formation of the Kuroshio LM.
关键词	Kuroshio large meander nonlinear perturbation advection conditional nonlinear optimal perturbation(CNOP)
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A010;
CNKI专题名称	海洋学;
分类号	P731.27
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National Natural Science Foundation of China(Nos.41230420,41306023) ; the Basic Research Program of Science and Technology Projects of Qingdao(No.11-1-4-95-jch) ; the Open Fund of LASG,Institute of Atmospheric Physics,Chinese Academy of Sciences
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/190161
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.LASG,InstituteofAtmosphericPhysics,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Zhang PJ,Wang Q,Ma LB. Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model. 2015.