Numerical study on interaction between eddies and the Kuroshio Current east of Taiwan, China

Yunlong SHI; Dezhou YANG; Yijun HE

doi:10.1007/s00343-020-0010-0

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Numerical study on interaction between eddies and the Kuroshio Current east of Taiwan, China

Physics | Updated：2023-06-06

- Numerical study on interaction between eddies and the Kuroshio Current east of Taiwan, China
- Journal of Oceanology and Limnology Vol. 39, Issue 2, Pages: 388-402(2021)
- Affiliations：
  
  1.School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China
  2.Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  3.Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China
  4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
- Author bio：
  
  YANG Dezhou, E-mail: yangdezhou@qdio.ac.cn
- Funds：
- DOI：10.1007/s00343-020-0010-0
  CLC：
- Received：14 January 2020，
  
  Accepted：16 March 2020，
  
  Online First：01 April 2021，
  
  Published：2021-03
- Accepted：
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Yunlong SHI, Dezhou YANG, Yijun HE. Numerical study on interaction between eddies and the Kuroshio Current east of Taiwan, China[J]. Journal of Oceanology and Limnology, 2021, 39(2): 388-402.
DOI：

Yunlong SHI, Dezhou YANG, Yijun HE. Numerical study on interaction between eddies and the Kuroshio Current east of Taiwan, China[J]. Journal of Oceanology and Limnology, 2021, 39(2): 388-402. DOI： 10.1007/s00343-020-0010-0.

摘要

Abstract

We investigated the interaction between mesoscale eddies and the Kuroshio Current east of Taiwan

China

using a fine-resolution regional general circulation model. Mesoscale eddies are injected into a region east of Taiwan

China

according to the quasi-geostrophic theory of stratified fluids. Modeled eddies propagated westward at the velocity of the first baroclinic mode Rossby wave. When eddies collide with the Kuroshio Current east of Taiwan

China

the spatial structure and volume transport of the Kuroshio Current shows a significant variation. The upper 600 m of the anticyclonic eddy cannot cross the Kuroshio Current to reach the region west of the Kuroshio Current; rather

these waters flow northward along the eastern side of the Kuroshio Current. The upper water carried by the anticyclonic eddies cannot reach the shelf of the East China Sea (ECS). In contrast

the waters in the upper layer of the cyclonic eddy reach the western side of the Kuroshio Current and then flow northward. The dynamic mechanism analysis shows that the interaction between the Kuroshio Current and the cyclonic (anticyclonic) eddy decrease (increase) the horizontal potential vorticity (PV) gradient

or PV barrier

whereby the cyclonic (anticyclonic) eddy can (cannot) cross the Kuroshio Current. This study implies that the continental shelf could potentially be influenced by cyclonic eddies in the open ocean

which can transport heat and material from the upper open ocean across the Kuroshio Current to the shelf waters.

关键词

Keywords

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