Journal of Tropical Oceanography ›› 2017, Vol. 36 ›› Issue (4): 35-47.doi: 10.11978/2016118CSTR: 32234.14.2016118

• Orginal Article • Previous Articles     Next Articles

Using idealized numerical experiment to study an eddy colliding with an island*

Zilin WEI1,2(), Huijie XUE1,3(), Huiling QIN1, Bingxu GENG1   

  1. 1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. School of Marine Sciences, University of Maine, the State of Marine 04469, USA
  • Received:2016-11-17 Revised:2017-04-07 Online:2017-07-20 Published:2017-07-26
  • Supported by:
    National Natural Science Foundation of China (41476013);Chinese Academy of Sciences Strategic Leading Science and Technology Projects (XDA11010304)

Abstract:

In this study, we used the Regional Ocean Modeling System (ROMS) to investigate the interaction of eddy with an island by constructing an idealized numerical experiment on the f-plane. The results are as follows. Under the specified condition of the idealized experiment, when the anticyclonic eddy in the Northern Hemisphere collides with the island of a comparable size, part of the anticyclonic eddy's vorticity bypasses the island from the left side of the moving eddy to form a new anticyclonic eddy. At the same time, a new cyclonic eddy forms on the right side of the eddy. In the colliding process, the island mainly acts as a blocking object to increase the vorticity gradient near collision point and to aggregate the positive and negative vorticity related to the eddy leading to modification of the eddy structure.

Key words: eddy, island, collision, ROMS, idealized experiment

CLC Number: 

  • P731.2