江淮气旋的能量变化

A DIAGNOSTIC CASE STUDY OF ENERGY BUDGET FOR A JIANG-HUAI CYCLOGENESIS

摘要: 关于气旋中的能量变化,已经有了不少的论述1-5.江淮气旋是产生我国南方地区暴雨的主要天气系统之一.弄清楚其中的能量变化,对于了解它的结构及其发生发展的机制,都是非常必要的.本文取一江淮气旋为例,主要讨论扰动有效位能和扰动动能的变化,也涉及到有效位能和动能的变化.1982年5月12日08时,在武汉东北约200km处,有一个气旋生成.这个气旋,是冷锋进入倒槽、并有暖锋锋生而形成的.生成时,气旋中心上空300hPa的风只约12m/s,500hPa在107°E有一弱槽,东南沿海为副高控制.

Abstract: The energy budget is analysised for a case of a Jiang-Huai cyclogenesis. The results show that during the development of the cyclone the eddy kinetic energy within the region under investigation is increased. The release of eddy available potential energy due to the convective activities is the primarily source of the eddy kinetic energy.