摘要
利用宜昌多普勒天气雷达回波资料,分析了2001年7月2日发生在三峡坝区瞬间极大风速达28.8m·s-1的强对流风暴。结果发现:在环境风场为偏南气流的引导下,神农架南坡有一条中尺度辐合线,对流云在该辐合线附近生成和发展,然后沿神农架东缘东北移动并影响三峡坝区,表明神农架南坡的山前涌升效应对该强风暴有一定的触发和维持作用。
Based on the echo data of the Yichang WSR-98D S- band Doppler weather radar, a severe storm with 28.8 m · s^-1 maximum instantaneous wind speed at the Three Gorge Dam Area on 2 July 2001 is analyzed. The result shows that, under the condition of environmen- tal southerly airflow field, there was a meso-scale convergence line on the southern slop of the Shennongjia Mountain, the convective clouds developed near the convergence line, then moved northeastward along the eastern slop of the Shennongjia Mountain, and affected the Three Gorge Dam Area. It suggests that the upwind airflow surge at the southern slop of the Shennongjia Mountain triggered and maintained the severe storm in some degree.
出处
《气象》
CSCD
北大核心
2006年第5期52-56,共5页
Meteorological Monthly
关键词
雷达回波
强对流风暴
山前涌升效应
radar echo severe convective storm upwind airflow surge
