气候变化领域集成服务门户(CCPortal): Bidirectional Volume Exchange Between Kuroshio and East China Sea Shelf Water Based on a Whole-Region Passive-Tracing Method

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DOI	10.1029/2019JC015528
	Bidirectional Volume Exchange Between Kuroshio and East China Sea Shelf Water Based on a Whole-Region Passive-Tracing Method
	Hu F.; Liu Y.; Xu Z.; Yin Y.; Hou Y.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	The Kuroshio intrusion has a profound influence on the marine dynamic and ecological environment in the East China Sea (ECS) shelf. In most previous studies, the intrusion has been evaluated by the volume transport across the 200 m isobath. However, this approximate substitution leads to an underestimation of the Kuroshio intruding flux as it fails to separate the onshore and offshore transport of Kuroshio and shelf water. In this paper, a whole-region passive-tracing modeling method is proposed to quantitatively explore the bidirectional exchange of Kuroshio and shelf water, by introducing the Kuroshio water concentration as a passive tracer into the flux calculations. In terms of the climatological annual mean, the Kuroshio intrusion onto the ECS shelf is as high as 1.85 Sv (1 Sv = 106 m3 s−1), with a shelf water outflow rate of 0.42 Sv. The real Kuroshio intruding flux is about 30% higher than the net volume transport across the 200 m isobath (1.43 Sv), which indicates that the influence of the Kuroshio intrusion on the ECS may be far greater than believed before. The volume exchange on the inner shelf of the ECS is also discussed. Analyses of the momentum balances indicate that the exchanges on both the shelf break and the inner shelf are generally dominated by the geostrophic balance, but the exchange on the shelf break is more susceptible to nonlinear effects. The results of a set of sensitivity experiments show that variation of the Kuroshio intrusion is mainly regulated by the combined effect of the Kuroshio transport, the Taiwan Strait current, and the local wind stress. In contrast, the local wind stress has a predominant effect on the outflow of shelf water. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	East China Sea; Kuroshio intrusion transport; whole-region passive-tracing method
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186886
作者单位	CAS, Key Laboratary of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
推荐引用方式 GB/T 7714	Hu F.,Liu Y.,Xu Z.,et al. Bidirectional Volume Exchange Between Kuroshio and East China Sea Shelf Water Based on a Whole-Region Passive-Tracing Method[J],2020,125(5).
APA	Hu F.,Liu Y.,Xu Z.,Yin Y.,&Hou Y..(2020).Bidirectional Volume Exchange Between Kuroshio and East China Sea Shelf Water Based on a Whole-Region Passive-Tracing Method.Journal of Geophysical Research: Oceans,125(5).
MLA	Hu F.,et al."Bidirectional Volume Exchange Between Kuroshio and East China Sea Shelf Water Based on a Whole-Region Passive-Tracing Method".Journal of Geophysical Research: Oceans 125.5(2020).