摘要
通过对1981年7月11～14日川西暴雨和1982年7月26～29日川东暴雨的天气形势诊断分析和数值试验得出,盛夏川西暴雨多与高原低涡的加强有关。高原涡的东移与副热带高压的西南气流结合极易产生暴雨。川东出现暴雨时,高原上低值系统移动较快,东部多为西北气流控制。高原大地形影响着高原东部降水、低值系统的生成发展移动和副热带高压。105°E以东的地形对川东暴雨的影响较川西大。我国东部地形对高原降水有减弱作用。
Through synoptical diagnosis and numerical study of the Sichuan torrential rain events,one in the western part on July 11～14,1981 and the other in the eastern on July 26～ 29,1982,we come to the conclusion that the western event was largely related to the enhanced Tibetan vortex which migrated east to meet SW flow along the brim of a subtropical high,result- ing quite easily in the event whilst the eastern event occurred due to the fact that the Plateau low- value system moved rather fast and the eastern Tibet was under the effect of NW flow;the huge relief affected the precipitation over the eastern highland,the genesis,development and travelling of the low-value system,and the subtropical high;the terrain east of 105°E had more influence on the eastern event;the relief in east China served as a weakening factor for the highland rain- fall.
出处
《南京气象学院学报》
CSCD
1996年第2期227-233,共7页
Journal of Nanjing Institute of Meteorology
基金
"八五"攻关课题85-906-08-04-06资助项目
