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Three dimensional diagnostic,semidiagnostic and prognostic calculations of current in the East China Sea in April of 1994

引用

Acta Oceanologica Sinica 2001年第1期20卷 15-28页

作者： Wang Huiqun 1,2 ,Yuan Yaochu 1,21 .KeyLaboratoryofOceanDynamicProcessesandSatelliteOceanography ,StateOceanicAdministration ,China　2 .SecondInstituteofOceanography ,StateOceanicAdministration ,POBox .12 0 7,Hangzhou 310 0 12 ,China Key Lab. Ocean Dynamic Processes S. State Oceanic Administration China Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 PO Box. 1207 China

Three dimensional diagnostic,semidiagnostic and prognostic models in the σ coordinate are used to compute the current in the East China Sea with wind and hydrographic data obtained from the investigation of ocean fluxes in the East China Sea during the cruise of April *** computed results show that:the density and velocity fields and so on have been adjusted when time t ≈ 23 d, i.e.,the solution of semidiagnostic calculation has been *** quasi steady state solution also has been reached after about 60 *** the results of diagnostic calculation with those of semidiagnostic and prognostic calculations,it is found that they agree *** example,they all show that:(1)The Kuroshio flows along the shelf break of 200～1 000 m isobaths;(2)In the southeastern part of the computational region there is a stronger counter current with an anticyclonic eddy;(3)The volume transport through Section PN is about 30×10 6m 3/s and so *** there are some quantitative differences between *** example,(1)For the semidiagnostic results the Kuroshio current is stronger and clearer than that for diagnostic results and the Kuroshio width is more narrow than that for diagnostic *** shows that the semidiagnostic calculation can better reflect the topography effect;(2)In most computed region the vertical component of velocity intensifies for semidiagnostic result,especially on the shelf *** the results of semidiagnostic calculation with those of prognostic calculation,they agree qualitatively,and also agree quantitatively in the middle of computed region.

关键词： Circulation in the East China Sea diagnostic calculation semidiagnostic calculation prognostic calculation

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