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利用非线性惯性理论研究南极绕极流及其经圈环流.模型分为上下两层,上层为Ekman层,主要由海表风应力驱动;下层为温跃层,其运动由理想流体的非线性方程控制.通过确定普适函数的形式求得温跃层中惯性模型的解.计算结果表明,在上层条件不变的情况下,温跃层存在两个平衡态解.平衡态1的流函数分布较为平滑,经圈环流深度较浅,纬圈流强度较小;平衡态2的流函数会出现不连续的状况,经圈环流可达2000m深,纬圈流的强度要比平衡态1大.两个平衡态中纬圈流在温跃层中均存在一个大值区.理论结果特别是平衡态2的结果与资料较为接近.
The non-linear inertial theory is used to study the circulation of the Antarctic and its meso-circulation.The model is divided into upper and lower two layers, the upper layer is the Ekman layer, which is mainly driven by the sea surface wind stress and the lower layer is the thermocline whose motion is determined by the non- Equation control.The solution of inertial model in thermocline is obtained by determining the form of ubiquitous function.The calculation results show that there are two equilibrium states in the thermocline under the condition of the upper layer.The flow function of equilibrium state 1 The distribution is smooth, and the circulation depth is shallow and the strength of the weft lap flow is small. The flow function of the equilibrium state 2 will appear discontinuous. The circulation of the lap flow reaches up to 2000m deep and the strength of the lap flow is larger than that of the equilibrium one Both latitudinal cycles in the two equilibrium states have a large value region in the thermocline, and the theoretical results, especially the equilibrium state 2, are quite close to the data.