基于多普勒雷达产品的2016年洞庭湖区岳阳3次暴雨分析

Analysis of Three Heavy Storms in Yueyang Dongting District on 2016 by using the Doppler Radar Data

利用多普勒雷达回波产品资料,对2016年4月19—21日、5月8—10日、7月1—5日岳阳3次特大暴雨过程进行分析。结果表明,回波多为积云和层云降水回波,强度在30 dbz以上降水效率高,预报中需要特别注意;暴雨的发生发展与中小尺度系统的生成和发展分不开;风廓线图可以有助于了解暴雨系统的垂直方向特征,可以推测系统的发生发展趋势;热带海洋性降水过程降水效率高,持续时间长,易形成暴雨。

Based on the Doppler radar data, the processes of three heavy rainstorms that separately happened on April19 th-21 st,May 8 th-10 th and July 1 st-5 th in Yueyang were analyzed. The results showed that the rain echo was mostly reflected in the cumulus cloud and stratus. As the intensity reached 30 dbz or above, it can cause high precipitation.More attention should be played when doing the weather forecast. The occurrence and development of storm were influenced by the meso and small scale systems; The VAD Wind Profile helps to know the vertical direction features of storm system and speculate its tendency. The high precipitation and long duration in the process of tropical Marine precipitation can easily form heavy storm.