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本文应用一个包含动力学和热力学的热带海洋两层半模式，模拟南海上层海洋闭边界条件下的季节性环流。模式海洋由不同密度的上混合层、季节性温跃层和静止的深水层组成。模式考虑挟卷（卷入ｅｎｔｒａｉｎｍｅｎｔ和卷出ｄｅｔｒａｉｎｍｅｎｔ）引起海洋上下活动层间的质量、动量与热量的交换，在海面月平均气候风场动力强迫和通过海面热通量的热力影响下，计算了封闭海盆假定下的南海上层海洋的季节环流。用数值试验的方法讨论了非线性效应、摩擦阻尼、侧向混合对大尺度环流的影响，并得出有关模式稳定性的结论。模拟结果与南海海洋实测和动力诊断的环流趋势吻合较好，显示了模式对南海海盆尺度的环流系统有较好的模拟能力。
In this paper, a tropical two-and-a-half ocean model with dynamics and thermodynamics is used to simulate the seasonal circulation in the closed boundary conditions of the upper South China Sea. The model ocean consists of an upper mixed layer of different densities, a seasonal thermocline and a still deepwater layer. The model considers entrainment (involvement entrainment and detrainment) causes the exchange of mass, momentum and heat between the upper and lower layers of the oceans, under the influence of the thermal force of the sea surface monthly mean wind field and the thermal flux of sea surface heat flux, The seasonal circulation of the upper ocean in the South China Sea under the assumption of a closed basin. The effects of nonlinear effects, frictional damping and lateral mixing on large-scale circulation are discussed by means of numerical experiments and conclusions about the stability of the model are obtained. The simulation results are in good agreement with the circulations of oceanic measurement and dynamic diagnosis in the South China Sea. It shows that the model has a good ability to simulate the circulation system in the South China Sea basin scale.