A study on the surface current variation within half-year time scale in active region of the Kuroshio in East China Sea

Wang Xingzhi; Li Chongyin; Wang Guihua

doi:10.3969/j.issn.0253-4193.2014.11.001

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Wang Xingzhi, Li Chongyin, Wang Guihua. A study on the surface current variation within half-year time scale in active region of the Kuroshio in East China Sea[J]. Haiyang Xuebao, 2014, 36(11): 1-11. doi: 10.3969/j.issn.0253-4193.2014.11.001

Citation:

Wang Xingzhi, Li Chongyin, Wang Guihua. A study on the surface current variation within half-year time scale in active region of the Kuroshio in East China Sea[J]. Haiyang Xuebao, 2014, 36(11): 1-11. doi: 10.3969/j.issn.0253-4193.2014.11.001

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A study on the surface current variation within half-year time scale in active region of the Kuroshio in East China Sea

doi: 10.3969/j.issn.0253-4193.2014.11.001

1.
Institute of Meteorology and Ocean, People's Liberation Army University of Science and Technology, Nanjing 211101, China
2.
Institute of Meteorology and Ocean, People's Liberation Army University of Science and Technology, Nanjing 211101, China;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

Received Date: 2013-10-23

Abstract

Abstract

Using high resolution data,the surface current variation within half-year time scale in active region of the Kuroshio in East China Sea is studied in this paper. The major results are as follows: (1) The northeast Taiwan area and near Tokara Strait region are two regions with the most remarkable variation of the surface current of Kuroshio in East China Sea (ECS). (2) There are the surface current variations within half-year time scale in two regions,the quasi-periodic transformation between anomalous cyclonic vortex and anomalous anticyclonic vortex is basic feature of the surface current variation. The spectrum peaks of the quasi-periodic transformation are mainly at 50 to 70 days and 90 to 140 days.(3)The actions of anomalous cyclonic vortex and anomalous anticyclonic vortex are closely related to the current axle variations of the Kuroshio in East China Sea,the action of anomalous cyclonic vortex (anticyclonic vortex) is accompanied with the flinching to southeast (the pushing on northwestwards) of the Kuroshio current axle. (4) In northeast of Taiwan area,the 50 to 70 days oscillation of the Kuroshio in East China Sea is mainly originated from the Kuroshio mesoscale fluctuation; the 90 to 140 days oscillation is mainly influenced by the mesoscale eddies from east of Taiwan. Analogously,the 50 to 70 days oscillation of the Kuroshio in East China Sea is mainly originated from the Kuroshio mesoscale fluctuation at upper reaches of the Kuroshio; the 90 to 140 days oscillation is mainly influenced by the mesoscale eddies from east of the Pyukyu gunto.

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References(25)

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