Calculation of circulation in the South China Sea during the summer of 2000 by the modified inverse method

YUAN Yao-chu; LIU Yong-gang; LOU Ru-yun; SU Ji-lan; WANG Kang-shan

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YUAN Yao-chu, LIU Yong-gang, LOU Ru-yun, SU Ji-lan, WANG Kang-shan. Calculation of circulation in the South China Sea during the summer of 2000 by the modified inverse method[J]. Haiyang Xuebao, 2004, 26(1): 1-13.

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Calculation of circulation in the South China Sea during the summer of 2000 by the modified inverse method

1.
Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of OceanDynamic Processes and Satellite Oceanography of State Oceaceanic Administration, Hangzhou 310012, China;
2.
College of Marine Science, University of South Florida, U.S.A.

Received Date: 2003-05-04
Rev Recd Date: 2003-07-10

Abstract

Abstract

On the basis of hydrographic data obtained in August 2000 cruise,the circulation in the South China Sea (SCS)is computed by using the modified inverse method in combination with SSH data from TOPEX/ER S-2 Analysis.The following results have been obtained.(1)The central and southw estern SCSs are dominated mainly by anticyclonic circulation systems.They are mainly as follows.1)There is strong anticyclonic eddy southeast of Vietnam(W₁).Its horizontal scale is about 300 km,and it extends vertically from the surface to the 1 000 m more than.It is very strong with a V_max of about 79 cm/s;2)there are a warm eddy W₂ and the anticyclonic circulation system W₃ west off the Philippines.In the next place,there is a stronger cyclonic eddy C₁ between the anticy clonic eddies W₁ and W₂,and it is also strong.A southward flow exists between the eddies W₁ and C₁.The eddies W₁ and C₁ compose a quasi-dipole.(2)A strong coastal jet is present at the western boundary west of an anticy clonic eddy W₁,and the jet flows northward and separates from the coast of Vietnam at about 12°N to the northeast.
- SCS circulation in summer of 2000,
- obvious seasonal feature,
- multi-eddies structure,
- modified inverse method

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References

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