Analysis on the Radar Echo＇s Characteristics of One Severe Rainstorm in Central Guangxi

• 作者: JIA Xian-feng WEN Shui-rong ZHU Ming
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 雷达回波特征 广西中部 大暴雨 多普勒天气雷达 多单体风暴 中尺度辐合线 自动气象站 强降水过程
• 年，卷（期）: 2012,（7）
• 页码范围: 15-18
• 页数: 4页
• 分类号: P458.121.1

摘要

[Objective]The aim was to analyze radar echo characteristic of a heavy rainstorm in central Guangxi in June,2010. [Method] Using conventional observations and automatic stations,Doppler radar and other data,a severe rainstorm in central of Guangxi which occurred on 31 May to 1 June 2010 was analyzed. The characteristics of weather radar data were analyzed to reveal the characteristics of radar echo during the heavy precipitation process. [Result]The heavy rainstorm had gone through many singular wind storms towards MCS variation. The existence of ultra-sin-gular and ' train effect' was the main reason of the heavy rainstorm. The results showed that during the heavy rainfall experienced an evolution process from multi-cell storm to MCS,and found that super cell and the ' train effect' was the major reason which caused this torrential rain. The echo centroid of multi-cell storm stretching along its moving reverse order was the key factor which maintained the heavy rain. Analysis also found that the average echo intensity had a good relationship with rainfall. Strong echoes were in quasi-stationary state for a long time and was favorable heavy rain. In the diameter velocity diagram,mesoscale convergence line,the adverse wind regions and the mid-cyclone were the important basis to determine producing and keeping heavy rainfall. Radar wind profile can reflect the configuration of layers of wind conditions,and it was an effective tool to determine whether the trough was in transition or not. [Conclusion]The study provided reference for the short-term and nowcasting report.