梅雨锋中尺度系统及其与大尺度运动相互作用的能量学研究

AN ENERGETICS STUDY ON THE INTERACTION BETWEEN MESO SCALE SYSTEMS AND BETWEEN LARGE AND MESO SCALE MOTIONS IN THE MEIYU FRONT PROCESSES

本文导出了二维非均匀介质中重力惯性波的频散方程、波列传播路径方程和考虑了中尺度与天气尺度运动之间相互作用的动能收支方程,并用于讨论了一个典型的梅雨锋过程。研究发现,由一条中尺度雨带强迫产生的重力惯性波的能量频散可能成为另一条中尺度雨带生成和维持的机制;中尺度与天气尺度运动之间相互作用所产生的动能交换是中尺度系统发展的一个非常重要的动能来源,在中尺度系统的维持中也有重要作用。

This paper obtains gravity inertial waves in the two-dimensional nonuniform medium, the path equation of wave trains propagation and the kinetic energy budget equations in terms of the interaction between meso and synoptic scale movement and applies them to discuss a typical Meiyu frontal process. It is shown that the energy dispersion of gravity inertial waves forced by one meso-scale rainband is probably a mechanism in the generation and the maintenance of another meso-scale rainband; the energy exchange produced by the interaction between meso and synoptic scale movement is a very important kinetic energy source for the meso-scale systems development and plays an important role in the maintenance of meso-scale systems.