垂直切变基流中非地转涡旋波的不稳定

利用Boussinesq方程研究了扰动传播方向与垂直切变基流有一夹角时的不稳定问 题，即斜交型不稳定问题。当Richardson数不大时，在α中尺度波段其增长率最大，此时该斜交型不稳定的性质既不同于重力惯性波的对称不稳定，也与Rossby波的斜压不稳定有差异，而是非地转涡旋波的不稳定。

A Study of Instability of Ageostrophic Vortex Wave on the Condition of Vertical Shearing Basic Flow

The baroclinic ageostrophic model is used in this paper to study the stability of disturbance when there exists an angle between the spreading direction of disturbance and the basic flow. When the Richardson number is not too great, the heterotrophic instability achieve its maximum value in the meso-α scale region, while the symmetric instability and transverse instability remain stable in the same region. This heterotrophic instability is neither the inertia-gravitational wave instability nor Rossby wave instability, and it is the ageostrophic vortex wave instability.