摘要
利用常规的天气图和物理量资料对1994年8月5～6日发生在陕西中部的一次区域性大风、冰雹、强暴雨天气进行诊断分析,结果表明:登陆台风的北上使得副热带高压东退,导致西风槽向东移动,带来弱冷空气,触发了陕西中部不稳定能量的释放。登陆台风向暴雨区输送了大量的能量和水汽。850hPa偏东急流左前侧的辐合区与200hPa西南急流入口区右侧辐散区重叠,产生的急流次级环流为强雷暴提供了持续强劲的上升运动。
By using the routine sounding and surface observation data a large area lasting heavy rainstorm which took place in middle part of Shaanxi province on August 5～6 , 1994 was diagnosed and analyzed. The results show that the landing northward typhoon made the subtropical high passing along east and resulted in the moving east of west trough and coming of cold air,instabillty energy was released in middle part of Shaanxi. A huge amount of energy and vapor of the landing typhoon were taking to rainstorm area. The sub-circulation caused by coupling of left convergence of east jet at 850 hPa and right divergence of entering place of southwest jet at 200 hPa supplied a continuous and powerful updraft.
出处
《气象科学》
CSCD
北大核心
2005年第3期312-318,共7页
Journal of the Meteorological Sciences
基金
国家社会公益服务专项资金项目(编号:2001DIB20095)资助
关键词
登陆台风
强雷暴
次级环流
The landing typhoon Heavy rainstorm Energy vapor sub-circulation
