摘要
本文利用正压涡度方程讨论了旋转平行流的稳定性问题。导出了一个显式正压稳定性判据。它把扰动的增长率(kc_(i))与能量转换函数直接联系起来了。结果表明,扰动的增长率正比于基本流与扰动间的动能转换率。此外,还讨论了基本流具有线性切变的情形,所得结果与Haltiner所给出的β=0时的结果大致类似。
The stability problem of rotating parallel flows was discussed by use of the barotropic vorticity equation.A stability.criterion of barotropic stability was obtained.It is an explicit expression which relates the perturbation growth rate to the function of the energy conversion between basic motion and perturbation.The results indicate that the growth rate of perturbation is proportional to that of the energy conversion.In addition,the case of a basic flow with horizontallinear shear was treated forβ≠0.Some results obtained are similar to that given by Haltiner(1971)for β=0.The perturbations are damped waves.The wave speed,however,has a westward component which depends upon the strength of the shear of basic flows.
作者
贺海晏
He Hai-yan(Meteorology Department of Zhong-Shan University)
出处
《气象学报》
1982年第4期409-416,共8页
Acta Meteorologica Sinica
