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

Content Provider	Springer Nature Link
Author	Zhang, Peijun Wang, Qiang Ma, Libin
Copyright Year	2015
Abstract	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.
Starting Page	252
Ending Page	261
Page Count	10
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	33
Issue Number	1
e-ISSN	19935005
Language	English
Publisher	Science Press
Publisher Date	2014-10-27
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Kuroshio large meander nonlinear perturbation advection conditional nonlinear optimal perturbation (CNOP) Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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