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

Peijun Zhang; Qiang Wang; Libin Ma

doi:10.1007/s00343-014-3285-1

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

OriginalPaper | Updated：2023-05-16

- Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model
- Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model
- 海洋湖沼学报（英文） 2015年33卷第1期页码：252-261
- Affiliations：
  
  1. Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
  3. LASG Institute of Atmospheric Physics Chinese Academy of Sciences
- Author bio：
- Funds：
  
  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), and the Open Fund of LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences
- DOI：10.1007/s00343-014-3285-1
  中图分类号：
- 网络首发：2014-10-27，
  
  纸质出版：2015
- Accepted：
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Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model[J]. 海洋湖沼学报（英文）, 2015,33(1):252-261.

Zhang, P., Wang, Q. & Ma, L. Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model., Chin. J. Ocean. Limnol. 33, 252–261 (2015). https://doi.org/10.1007/s00343-014-3285-1
Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model[J]. 海洋湖沼学报（英文）, 2015,33(1):252-261. DOI： 10.1007/s00343-014-3285-1.

Zhang, P., Wang, Q. & Ma, L. Impact of nonlinear processes on formation of the Kuroshio large meander path in a barotropic inflow-outflow model., Chin. J. Ocean. Limnol. 33, 252–261 (2015). https://doi.org/10.1007/s00343-014-3285-1 DOI：

摘要

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.

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Keywords

references

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