湘潭极端短时强降水的多尺度分析与临近预警

Multi-scale Analysis and Near Warning of the Extreme Short-term Heavy Precipitation in Xiangtan

利用湘潭市2010—2019年4—9月区域自动站逐小时降水量、高空地面观测资料、多普勒天气雷达资料,采用统计学方法,分析了短时强降雨的时空分布特征,同时使用天气学诊断方法,深入研究了极端短时强降水发生的天气系统、物理量特征、雷达特征。结果表明:极端短时强降水发生的环流背景为低槽切变型、波动气流型、副高边缘型、热带气旋型,其中低槽切变型出现次数最多。

In this paper, using the xiangtan city regional automatic station by hour rainfall, high ground observation data from April to september during 2010~2019,doppler weather radar data, using statistical methods, analysis of short time and space distribution characteristics of heavy rainfall,at the same time using extreme weather science diagnosis methods in-depth study of precipitation period of weather system,physical characteristics, characteristics of radar. The results showed that the circulation background of extreme short-time heavy rainfall was low trough shear type, fluctuating airflow type, subtropical high marginal type and tropical cyclone type, and the low trough shear type was the most frequent.