The three dimensional structure of the circulation in the South China Sea during the summer of 1998

LIAO Guang-hong; YUAN Yao-chu; WANG Zhang-gui

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LIAO Guang-hong, YUAN Yao-chu, WANG Zhang-gui. The three dimensional structure of the circulation in the South China Sea during the summer of 1998[J]. Haiyang Xuebao, 2006, 28(5): 15-25.

Citation:

LIAO Guang-hong, YUAN Yao-chu, WANG Zhang-gui. The three dimensional structure of the circulation in the South China Sea during the summer of 1998[J]. Haiyang Xuebao, 2006, 28(5): 15-25.

LIAO Guang-hong, YUAN Yao-chu, WANG Zhang-gui. The three dimensional structure of the circulation in the South China Sea during the summer of 1998[J]. Haiyang Xuebao, 2006, 28(5): 15-25.

Citation:

LIAO Guang-hong, YUAN Yao-chu, WANG Zhang-gui. The three dimensional structure of the circulation in the South China Sea during the summer of 1998[J]. Haiyang Xuebao, 2006, 28(5): 15-25.

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The three dimensional structure of the circulation in the South China Sea during the summer of 1998

1.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
National Center for Marine Environmental Forecasts, Beijing 100081, China

Received Date: 2005-10-15
Rev Recd Date: 2006-08-04

Abstract

Abstract

On the basis of hydrog raphic data obtained from 12 June to 6 July,1998, the three dimensional structure of circulation in the South China Sea (SCS) is computed by using three dimensional diagnostic model.The combination of sea surface height anomaly from altimeter data and numerical results provides a consistent circulation pattern for the SCS, and the main circulation features can be summ arized as follows: (1) In the northern SCS, there are a cycloniceddy C1 near Dongsha Islands and an anti-cycloniceddy W1 in the area west of Luzon Island.(2) In the central SCS, a strong eranti-cyclonic eddy W3 and a cyclonic eddy C3 compose a quasi-dipole in the area southeast of Vietnam.(3) A coastal northwardjet is present at the western boundary near the coast of Vietnam.This northward coastjet flows northward and turns eastward at the about 14°N, and then it flows southeast ward into the area between eddies W3 and C3.(4) In the sout hern SCS the current is weaker.(5) Most important dynamical mechanism is because of the joint effect of the baro clinity and relief.The second dynamical mechanism is because of the interaction between the wind stress and relief.(6) The distribution of the vertical component of current velocity is discussed.(7) Comparing of the circulation in 1998 with 2000, their change is not large.
- circulation in the SCS,
- SSHA,
- diagnostic calculation,
- multi-eddies structure,
- dynamic factors

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References(29)

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