大气对流的阻尼模型

本文建立了同时包含线性和非线性层结和阻尼作用的大气对流模型，研究表明：阻尼条件下，对流稳定决定于层结和阻尼参数拱同作用，线性阻尼条件下，线性层结参数的正负变化会引发鞍结分岔，阻尼作用有利于对流稳定，即使线性、非线性层结构不稳定时仍可出现稳定，阻尼作用会引发新的平衡态，出现极限环。

A RESISTANCE MODEL OF THE CONVECTION IN ATMOSPHERE

In this paper, a atmospheric convection current model taking into consideration of the linear, nonlinear stratification and viscosity resistance simutaneously has been set up. It show that: Under the condition of resistance the stratified stability depends on the stratification and the strength parameter of viscosity. Under the condition of linear viscosity resistance, as the parameter of the linear stratification parameter changes from negative to positive can result in saddlenode bifurcatio. The impact of resistance is helpful to convective stability. Even if the linear and nonlinear stratification are both unstable, the situation of stability still can be reached. The function of resistance can cause new equilibrium state and arise limit cycle.