【摘要】 本文利用Reed的综合方法,对1983年5—9月四川省六次西南涡暴雨过程进行了分析,得出:暴雨的出现与西南涡的发展有密切关系;在涡发展时期,对流层高低层存在“三支气流”,并将其与美国落基山东侧暴雨区内的“三支气流”作了比较.更多还原

【Abstract】 In this article, six Sichuan heavy-rain processes which were caused by southwest vortex in May-September, 1983 are analysed by using Reed’s composite method. The average flow field of the vortex and the average characteristics of vorticity, divergence and vertical velocity are made out. The appearance of Sichuan heavy rains is closely associated with the development of southwest vortex. In the development of the vortex, there exist three branches of air flows in the upper and lower troposphere, which are compared with those in the heavy rain region onthe east side of Rocky Mountains.更多还原