NONLINEAR ROSSBY WAVE INDUCED BY LARGE-SCALE TOPOGRAPHY

In this paper, a barotropic model is used to discuss the nonlinear Rossby wave induced by the large-scale topography. By using separate multi-scale perturbation method and matching boundary condition, the general-ized KDV equation is obtained. Especially, in consideration of the effect of the Tibetan Plateau, the distribu-tions of the disturbance stream function is given. It is proved that solitary wave induced by the large-scale topog-raphy exists indeed and it has direct influence on the weather of its lower reaches.