Energetics Analysis of the Eddy-Kuroshio Interaction East of Taiwan

doi:10.1175/JPO-D-21-0198.1

IOCAS-IR > 海洋环流与波动重点实验室

	Energetics Analysis of the Eddy-Kuroshio Interaction East of Taiwan
	Yan, Xiaomei 1,2,3; Kang, Dujuan 4; Pang, Chongguang 1,2,3; Zhang, Linlin 1,2,3; Liu, Hongwei 1,2,3
	2022-04-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	52 期号:4 页码:647-664
通讯作者	Yan, Xiaomei(yanxiaomei@qdio.ac.cn)
摘要	The three-dimensional energetics evolution during eddy-Kuroshio interactions east of Taiwan is systematically investigated in a time-dependent theoretical framework using outputs from an eddy-resolving ocean general circulation model. Composite analyses are conducted based on 17 anticyclonic eddies (AEs) and 19 cyclonic eddies (CEs). These westward propagating mesoscale eddies impinge on the Kuroshio at similar to 22 degrees N, similar to 124.5 degrees E and interact with the Kuroshio with a mean duration of similar to 70 days. During the interaction, all the eddy energy reservoirs and eddy-mean flow energy conversions exhibit complex spatial-temporal variations. In particular, during the strong interaction period (days 18-54), both AEs and CEs are deformed into an elliptic shape, with the major axis in the northeast-southwest direction due to the squeeze of surrounding eddies, and obtain kinetic energy from the mean flow. Overall, the eddies are weakened gradually after encountering the Kuroshio, with the energy of CEs decreased more rapidly than that of AEs. The eddies decay through two pathways: transferring similar to 8% of eddy available potential energy (EPE) to the mean flow, and converting similar to 64% of EPE to eddy kinetic energy (EKE) via the baroclinic instability with the majority of the EKE finally dissipated. The results suggest that although the time-dependent energy conversion terms vanish upon time averaging, they play important but opposite roles in the evolution of AEs and CEs. The analysis in this work is on the synoptic and intraseasonal time scales; hence, it provides a basis for understanding the long-term variations of the eddy-Kuroshio interaction and associated climate change.
关键词	North Pacific Ocean Eddies Mesoscale processes
DOI	10.1175/JPO-D-21-0198.1
收录类别	SCI
语种	英语
资助项目	Shandong Provincial Natural Science Foundation[ZR2021MD092] ; National Natural Science Foundation of China[42122041] ; National Natural Science Foundation of China[41776021] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42010105]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000797940200007
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/179423
专题	海洋环流与波动重点实验室
通讯作者	Yan, Xiaomei
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 4.Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ USA
第一作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
通讯作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Yan, Xiaomei,Kang, Dujuan,Pang, Chongguang,et al. Energetics Analysis of the Eddy-Kuroshio Interaction East of Taiwan[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2022,52(4):647-664.
APA	Yan, Xiaomei,Kang, Dujuan,Pang, Chongguang,Zhang, Linlin,&Liu, Hongwei.(2022).Energetics Analysis of the Eddy-Kuroshio Interaction East of Taiwan.JOURNAL OF PHYSICAL OCEANOGRAPHY,52(4),647-664.
MLA	Yan, Xiaomei,et al."Energetics Analysis of the Eddy-Kuroshio Interaction East of Taiwan".JOURNAL OF PHYSICAL OCEANOGRAPHY 52.4(2022):647-664.

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