摘要
本文是对第一部分的数值试验结果进行涡度方程以及位能、散度风动能和旋转风动能之间的能量转换函数诊断分析,并讨论了地形动力作用和潜热加热影响西南低涡形成和发展的物理过程.结果表明:从涡度收支上看,地形和潜热加热通过增大辐合使涡度增加.从能量转换上看,在低层地形和潜热加热加强位能向散度风动能转换以及散度风动能向旋转风动能转换;在高层,地形通过加强旋转风动能向散度风动能转换,使高空辐散增强,而潜热加热通过加强位能向散度风动能转换亦使高空辐散增强.
This paper applies the numerically simulated results of paper[1] to diagnose vorticity equation and the energy conversion function among potential energy , divergent wind energy and rotational wind energy. It is pointed out that the topography and latent heat may make vorticity increase by strengthening convergence .In the lower layer, topography and latent heat may also make potential energy convert into divergent wind energy and make divergent wind energy convert into rotational wind energy ; but in the upper layer , topography makes rotational wind energy convert into divergent wind energy and latent heat makes potential energy convert into divergent wind energy.
出处
《大气科学》
CSCD
北大核心
1992年第2期177-184,共8页
Chinese Journal of Atmospheric Sciences
关键词
西南
低涡
形成过程
诊断
数值试验
SW vortex
Diagnosis
Vorticity
Energy conversion .
