A WEAK NONLINEAR DYNAMICAL ANALYSIS OF THE DEVELOPMENT OF THE EARLY SOUTHWEST VORTEX UNSTABLE DISTURBANCE

By the critical perturbation method, the process of the unstable early southwest vortex disturbance developing to be stable under the functions of adjustment and feedback of the weak nonlinear vertical advection caused by the vertical unevenness of the vertical velocity and the potential temperature is discussed. when the parameters of equation take suitable data, the solutions are consistent roughly with actual values, and they have the characteristic of the supercritical bifurcations.