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基于一个连续层化赤道海洋波动的弱非线性动力学系统，推导并建立了由最低阶Lagrange余流体现的包含波致、风生等效应在内的热带海洋余环流基本方程组。经分析发现，零阶赤道波动自身的非线性耦合可产生一阶余流，其量级对于热带上层海洋准定常环流而言是不可忽略的。波致环流的产生紧密联系于Lagrange轨迹运动与波流场的非线性耦合效应。所导出的最低阶赤道波致Lagrange余流的一般解具有与零阶波动不同的垂直与经向结构。从而表明，在赤道波运动占优势的连续层化海洋中，环流的产生机制，除了惯常认为的海面风应力和热盐强迫力外，波周期运动也可产生定常环流。
Based on a weakly nonlinear dynamical system with continuously stratified equatorial oceanic fluctuations, the basic equations of the tropical oceanic circulation system including the wave induced winds and wind induced by the lowest Lagrange residual fluid are derived and established. The analysis shows that the non-linear coupling of the zeroth-order equatorial fluctuations can produce first-order residual currents whose magnitude can not be neglected for the quasi-stationary ocean currents in the upper troposphere. The generation of wave induced circulation is closely related to the nonlinear coupling effect of Lagrange trajectory and wave field. The general solution of Lagrange residual flow derived from the lowest order equatorial wave has vertical and radial structures different from those of zero order. Thus, in the continuous stratified ocean where the equatorial wave movement is dominant, the circulation mechanism can produce a steady circulation due to the wave periodicity, except for the sea-wind stress and thermo-salt forcing force, which are generally considered.