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Multiscale energetics and submesoscale instabilities of eddy shedding at the Kuroshio loop current in the South China Sea

文献类型：期刊论文

作者Fei, Yunlong1,2,8; Zhang, Shaoqing1,2,4,8; Zhang, Zhengguang1,2; Gao, Yang1,5; Xu, Xing8; Li, Mengmeng3; Yu, Yangyang1,2; Wang, Kaidi6; Cui, Tong7
刊名SCIENTIFIC REPORTS
出版日期2025-08-25
卷号15期号:1页码:22
关键词Kuroshio loop current eddy shedding Multiscale energetics of mesoscales and submesoscales Submesoscale instabilities
ISSN号2045-2322
DOI10.1038/s41598-025-15739-6
通讯作者Zhang, Shaoqing(szhang@ouc.edu.cn)
英文摘要The multiscale energetics and submesoscale instabilities after the eddy shedding of Kuroshio Loop Current (KLC) intrusion into the South China Sea (SCS) remain ambiguous. Here, a typical KLC eddy shedding process is well simulated using a downscaled submesoscale-permitting model. Then, energy and dynamics diagnostics are employed to investigate the cross-scale interactions between mesoscales and submesoscales during and after this process. In energetics, although the forward and inverse energy cascades coexist, the forward cascade of available potential energy (APE) is crucial in energizing submesoscales, while the strength of forward kinetic energy (KE) is relatively weak. The submesoscale KE is primarily charged by strong buoyancy conversion and secondarily by horizontal advection from upstream, which is mainly balanced by turbulence dissipation and vertical pressure work. In dynamics, except for the release of submesoscale APE by baroclinic instability, symmetric instability (SI) can extract KE from geostrophic flows and drive forward KE cascades. Specifically, strain-induced advective frontogenesis can rapidly sharpen submesoscales by enhancing lateral buoyancy gradients, the increased baroclinicity together with atmospheric-forced buoyancy loss causes negative total Ertel potential vorticity and creates favorable conditions for SI. These results highlight the significance of submesoscales in multiscale energetics and dynamical instabilities of the KLC eddy shedding.
WOS关键词CALIFORNIA CURRENT SYSTEM ; SYMMETRIC INSTABILITY ; VARIABILITY ; MESOSCALE ; SURFACE ; ENERGY ; DISSIPATION ; TRANSITION ; SIMULATION ; VORTICITY
资助项目National Key Research and Development Program of China[LSKJ202300400] ; National Key Research and Development Program of China[LSKJ202300401-03] ; National Key Research and Development Program of China[LSKJ202202200] ; National Key Research and Development Program of China[LSKJ202202201-04] ; Science and Technology Innovation Project of Laoshan Laboratory[2022YFE0106400] ; National Key R&D Program of China[42361164616] ; National Natural Science Foundation of China[ts201712017] ; Shandong Province's Taishan Scientist Program
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:001559344300013
出版者NATURE PORTFOLIO
源URL[http://ir.qdio.ac.cn/handle/337002/203236]  
专题海洋研究所_海洋环流与波动重点实验室
通讯作者Zhang, Shaoqing
作者单位1.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Minist Educ, Qingdao, Peoples R China
2.Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
4.Qingdao Marine Sci & Technol Ctr, Lab Ocean Dynam & Climate, Qingdao, Peoples R China
5.Ocean Univ China, Key Lab Marine Environm Sci & Ecol, Minist Educ, Qingdao, Peoples R China
6.Chinese Acad Meteorol Sci CAMS QDIMM, Qingdao Inst Marine Meteorol, Qingdao, Peoples R China
7.Qingdao Leice Transient Technol Co Ltd, Qingdao, Peoples R China
8.Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Fei, Yunlong,Zhang, Shaoqing,Zhang, Zhengguang,et al. Multiscale energetics and submesoscale instabilities of eddy shedding at the Kuroshio loop current in the South China Sea[J]. SCIENTIFIC REPORTS,2025,15(1):22.
APA Fei, Yunlong.,Zhang, Shaoqing.,Zhang, Zhengguang.,Gao, Yang.,Xu, Xing.,...&Cui, Tong.(2025).Multiscale energetics and submesoscale instabilities of eddy shedding at the Kuroshio loop current in the South China Sea.SCIENTIFIC REPORTS,15(1),22.
MLA Fei, Yunlong,et al."Multiscale energetics and submesoscale instabilities of eddy shedding at the Kuroshio loop current in the South China Sea".SCIENTIFIC REPORTS 15.1(2025):22.

入库方式： OAI收割

来源：海洋研究所

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