IOCAS-IR  > 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, Xia1,2; Mu, Mu1,3; Wang, Qiang1,4,5
2018-08-01
Source PublicationJOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN0022-3670
Volume48Issue:8Pages:1771-1786
Corresponding AuthorWang, Qiang(wangqiang@qdio.ac.cn)
AbstractBased 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.
KeywordNorth Pacific Ocean Nonlinear dynamics Forecasting techniques Primitive equations model Interdecadal variability
DOI10.1175/JPO-D-17-0246.1
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000441232900001
PublisherAMER METEOROLOGICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/159662
Collection海洋环流与波动重点实验室
Corresponding AuthorWang, Qiang
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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