采用一维湍动能模式对南海南部的 SST及混合层进行数值模拟和数值试验。结果表明 :TKE模式能够模拟南海南部的海表面温度 SST以及除南海南部 5月中旬以外的上混合层深度随时间变化基本特征。在 5～ 6月 ,SST的日振荡主要依赖于短波辐射的日变化 ,风的混合作用抑制了 SST的日周期振荡。春季夏季风爆发期间 ,南海海面潜热通量和感热通量与短波辐射和风应力相比较 ,是一个对 SST和混合层影响较小的量。在春季南海南部 ,短波辐射作用能使 SST升高的最大值约为 4℃ ;潜热和感热通量能使 SST的下降的最大值为 3℃。风应力对南海混合层深度随时间变化趋势起着决定的作用 ,并能使其深度加深 2 0～ 30 m,而短波辐射则使混合层的深度变浅2～ 3m,潜热和感热通量会使混合层的深度加深 1～ 2 m。在春季南海南部 ,热通量对混合层深度的影响与风应力相比要小得多

In this paper, the one dimensional turbulence kinetic (TKE) model is used to simulate and do some experiments on the SST and the upper mixed layer in the south of the South China Sea (SCS). The results show that the TKE model can simulate the main features of the time variation of the SST and mixed layer depth except in the middle period of May. In May and June, the diurnal oscillation of the SST is mainly determined by the diurnal variation of solar short-wave radiation, and the mixing effect of the wind restrains the diurnal oscillation of the SST in the south of the SCS. Compared with solar short-wave radiation and the wind stress, the latent heat and sensible heat fluxes are a minor factor in controlling the variation of the SST and the mixed layer during summer monsoon onset in the SCS. Solar short wave radiation is the main heat source to maintain the SST. In spring, the effect of short-wave radiation could make the SST in the south of the SCS increase 4℃ or less; and latent heat and sensible heat fluxes could make the SST decrease 3℃. The wind controls the depth of the upper mixed layer, and its effect could make the mixed layer grow 20～30 m, the short-wave radiation could make the mixed layer shallow 2～3 m and the latent heat and sensible heat fluxes make the mixed layer become 1～2 m deeper. In the south of the SCS the effect of heat fluxes on the mixed layer depth is smaller than the effect of wind in spring.