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Journal of Oceanology and Limnology

, Volume 36, Issue 6, pp 2098–2109 | Cite as

Migration of mesoscale eddies across a leaping or penetrating western boundary current in the vicinity of a gap

  • Xinxin Song (宋新新)
  • Dongliang Yuan (袁东亮)Email author
  • Ruixiang Li (李锐祥)
  • Zheng Wang (王铮)
Article
  • 17 Downloads

Abstract

A 1.5-layer quasi-geostrophic reduced gravity ocean circulation model is used to study the propagation of mesoscale eddies across a western boundary current (WBC) either leaping across or penetrating in an anti-cyclonic path through the gap. The steady leaping WBC nearly blocks all eddies from propagating across it through the gap completely. However, both cyclonic and anti-cyclonic eddies can migrate across a penetrating WBC in the vicinity of a gap, while inducing an opposite type of eddies on the cyclonic side of the WBC by weakening or strengthening the intrusion of the WBC. Both type of eddies gained strength from the WBC in the course of the propagation across the WBC in the gap. Eddies approaching the gap from the upstream are found to migrate more easily into the western basin due to the advection of the WBC. The migration speeds of the eddies are almost unchanged by the presence of the WBC in all experiments.

Keyword

mesoscale eddy Western Boundary Current gap 

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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Xinxin Song (宋新新)
    • 1
    • 2
    • 3
  • Dongliang Yuan (袁东亮)
    • 1
    • 3
    Email author
  • Ruixiang Li (李锐祥)
    • 4
  • Zheng Wang (王铮)
    • 1
  1. 1.Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, and Function Laboratory for Ocean Dynamics and ClimateQingdao National Laboratory for Marine Science and TechnologyQingdaoChina
  2. 2.Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, and Laboratory for Regional Oceanography and Numerical ModelingQingdao National Laboratory for Marine Science and TechnologyQingdaoChina
  3. 3.University of Chinese Academy of SciencesBeijingChina
  4. 4.South China Sea Marine Survey and Technology CenterState Oceanic AdministrationGuangzhouChina

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