摘要
本文将西南低涡视为迭加在环境场上的一个扰动,把考虑环境场和非绝热作用下的次天气尺度扰动方程组写在一个简单斜压两层模式上,根据西南低涡的特点对方程组作一些近似处理,导得了反映低层(700hPa)西南低涡移动特征的移矢诊断方程。由此分析了影响西南低涡移动的主要因子,得出了一些定性结果。最后,利用移矢诊断方程作了低涡移动的实例计算分析,其结果与实况比较一致。
In this paper, Southwest Vortex is regarded as a sub-synoptical scale disturbance in environment flow fields. The equations describing sub-synoptical scale disturbance are applied to a simple two layer model. According to some feature of the Southwest Vortex, the equations are simplified by making some approximations. The vector C indicating movement feature of the Southwest Vortex in lower troposphere is obtained by solving the equations. Using the diagnostic equation (35), the main factors which influence the movement of Southwest Vortex are discussed and some qualitative results are obtained. Finally, a case study of process of movement of Southwest Vortex is made by using these results.
出处
《高原气象》
CSCD
北大核心
1989年第4期301-312,共12页
Plateau Meteorology
关键词
环境场
西南低涡
移动
诊断
Southwest Vortex
Movement
Ambient fields
Diagnosis
