摘要
本文分析了1990年京津冀地区三次暴雨过程,结果发现:(1)三次暴雨是属于相伴有冷锋的高空槽影响的暴雨;(2)暴雨开始前约10小时雨区的西南方存在湿有效能量高能舌,高能舌的西方和北方有能量和水汽的积聚;(3)对流层低层的锋生和地形对气流的抬升作用是触发暴雨开始的直接原因。
In this article,three cases of heavy rains which occurred in the Jing-Jin-Ji area ofChina have been analysed.The results show:1.These heavy rains are affected by the up-per trough with cold front.2.Ten hours before the rains there exist high energy tonguesof moist available energy in the southwest of the rain area and the convergence of energyand vapor in the north and west of the high tongues.3.The frontgenesis of the lowertroposphere and the lifting role of the mountain are the direct triggering mechanisms.
出处
《应用气象学报》
CSCD
北大核心
1993年第3期349-355,共7页
Journal of Applied Meteorological Science
基金
京津冀强风暴实验室提供资助
关键词
暴雨
高空槽
湿有效能量
Heavy rain
Upper trough
Moist available energy
