厄尔尼诺/拉尼娜-南方涛动(ENSO)是一个包括在赤道太平洋中海-气交互作用的年际现象.本文创建一个求解ENSO模型非线性方程的近似方法.并在这基础上借助同伦映射方法研究了一类ENSO模型振子模型的近似解与精确解.同时讨论了近似解的精度.从得到的结果看出,同伦映射方法能够用于分析ENSO模型在赤道东太平洋中的SST异常和气-海振荡的温跃层深度异常.
The EI Nio/La Nia and the Southern Oscillation (ENSO) is an interannual phenomenon involved in the tropical Pacific Ocean-atmosphere interactions. This paper,aims at creating an approximate solving method of nonlinear equation for the ENSO models. And based on a class of oscillator of ENSO models,employing the method of homotopic mapping, the approximate and exact solutions of the corresponding problem is studied. The accuracy of approximate solution is discussed. It is proved from the results that homotopic method can be used for analyzing the SST anomaly in the equatorial eastern Pacific and the thermocline depth anomaly of the atmosphere-ocean oscillation for ENSO model.