IOCAS-IR  > 海洋环流与波动重点实验室
Optimal Precursor Triggering Kuroshio Large Meander Decay Obtained in a Regional Ocean Model
Liu, Xia1; Wang, Qiang2,3; Zhang, Hui4,5
2022-06-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume127Issue:6Pages:18
Corresponding AuthorWang, Qiang(wangq@hhu.edu.cn)
AbstractThis study investigates the optimal precursor (OPR) triggering Kuroshio large meander (LM) decay using a conditional nonlinear optimal perturbation (CNOP) approach and a regional ocean modeling system (ROMS). The results show that the large amplitudes of the OPR are mainly concentrated at 1,000-2,500 m in the LM upstream region (west of 137 degrees E), and their propagation downstream along the Kuroshio axis contributes to triggering the transition from the LM path to the nonlarge meander (NLM) path. Using the growth of the OPR, it is found that baroclinic instability contributes to the fast vertical development of the perturbations in the early stage of the LM decay, while barotropic processes play a leading role during the cyclonic ring shedding of the LM decay. In particular, the LM decay process is evaluated by the depth-integrated vorticity equation, implying that the advection term dominates over the beta effect in the LM decay. Furthermore, the vorticity balance associated with the cyclonic eddy indicates that the advection and divergence terms represent a main balance in the spin-down process of the cyclonic eddy. Under the effects of both, high potential vorticity water flows out from the LM meander tip and then the amplitude of the LM experiences a remarkable decrease. With the detachment of a cyclonic ring, a transition from the LM path to the NLM path occurs. This study further deepens our understanding of the LM decay and provides us some useful hints about designing the observation system of the LM.
Keywordpredictability large meander decay optimal precursor conditional nonlinear optimal perturbation
DOI10.1029/2021JC018397
Indexed BySCI
Language英语
Funding ProjectNational Natural Scientific Foundation of China[41906003] ; National Natural Scientific Foundation of China[42076017] ; National Natural Scientific Foundation of China[41906022] ; Fundamental Research Funds for the Central Universities[B200201011] ; Basic Research Projects of Key Scientific Research Projects Plan in Henan Higher Education Institutions[20zx003] ; Henan Natural Science Foundation[222300420579] ; Henan Province Key R&D and Promotion Project[222102210228]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000806638300001
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/179531
Collection海洋环流与波动重点实验室
Corresponding AuthorWang, Qiang
Affiliation1.Zhengzhou Univ Aeronaut, Sch Math, Zhengzhou, Peoples R China
2.Hohai Univ, Minist Nat Resources, Key Lab Marine Hazards Forecasting, Nanjing, Peoples R China
3.Hohai Univ, Coll Oceanog, Nanjing, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
5.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xia,Wang, Qiang,Zhang, Hui. Optimal Precursor Triggering Kuroshio Large Meander Decay Obtained in a Regional Ocean Model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(6):18.
APA Liu, Xia,Wang, Qiang,&Zhang, Hui.(2022).Optimal Precursor Triggering Kuroshio Large Meander Decay Obtained in a Regional Ocean Model.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(6),18.
MLA Liu, Xia,et al."Optimal Precursor Triggering Kuroshio Large Meander Decay Obtained in a Regional Ocean Model".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.6(2022):18.
Files in This Item:
File Name/Size DocType Version Access License
JGR Oceans - 2022 - (5258KB)期刊论文出版稿延迟开放CC BY-NC-SAView 2023-7-1后可获取
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Xia]'s Articles
[Wang, Qiang]'s Articles
[Zhang, Hui]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Xia]'s Articles
[Wang, Qiang]'s Articles
[Zhang, Hui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Xia]'s Articles
[Wang, Qiang]'s Articles
[Zhang, Hui]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: JGR Oceans - 2022 - Liu - Optimal Precursor Triggering Kuroshio Large Meander Decay Obtained in a Regional Ocean Model.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.