摘要
本文利用二维高阶矩湍流闭合的中尺度数值模式,模拟并讨论了孤立地形之上由白天谷风环流系统向夜问山风环流系统转换阶段的流场结构.结果指出,残余加热源激发出的重力内波对环流转换阶段的流场演变起着极其重要的作用,同时亦给出了相应的湍流结构图象.
In this paper, by using a two-dimensional meso-scale numerical model with the higher-order turbulent closure, the flow field structure over an isolated mountain is simulated and discussed for the period of the evening transition from valley wind circulations to mountain wind circulations. It is demonstrated that the gravity waves induced by the remained heat source play an extremely important role in the flow field evolution during the circulation transition period . And the physical figures of the corresponding turbulent structures are given at the same time .
出处
《大气科学》
CSCD
北大核心
1993年第1期112-120,共9页
Chinese Journal of Atmospheric Sciences
基金
国家教委高校博士点专项基金
关键词
山谷
环流转换
重力波
风
数值模拟
Mountain-valley circulation transition
Remained heat source
Gravity waves .
