忻州市一次强降水天气过程浅析

Analysis of a Heavy Rainfall Weather Process in Xinzhou

文中利用实况探测资料,介绍了忻州市一次大暴雨天气过程,从环流背景和物理量场两方面对此次暴雨的发生做了简要的分析,得出副高进退、低层切变线、露点锋、热力不稳定、动力抬升以及较厚的湿层是本次暴雨的触发条件;露点锋生去、假相当位温等值线密集带和大值区低层辐合大值区重叠的区域是暴雨多发区;暴雨、大暴雨发生在副高外围及切变线附近不断生成的对流云团边缘处。

Based on detection data, the paper introduces a heavy rain weather process in Xinzhou and makes a brief analysis from circulation background and physical field. The results show that advance and retreat of subtropical high, low level shear line, dew point line, unstable thermal, dynamic lifting and thicker wet layer cause the heavy rainfall. The rainstorm occurs at the edge of convective clouds around subtropical high and shear line.