泰安地区一次冰雹过程雷达回波特征分析

Analysis of Doppler Radar Echo Characteristics During a Heavy Hail in Taian

运用泰山CINRAD/CD多普勒天气雷达的资料,分析了发生在2013-09-15山东泰安市的一次冰雹天气过程。经分析得出:在PPI反射率因子图中冰雹特征不明显的情况下,从PPI径向速度图像中的中气旋结构可辅助判断是否发生冰雹天气。反射率因子垂直剖面图上的悬垂状回波和低层的弱回波可作为识别冰雹的特征;另外,可根据径向速度垂直剖面图判断垂直流场的特征,进一步确定冰雹天气。同时,垂直累积液态水含量(VIL)、回波顶高(ET)的跃增也是表征冰雹发生的重要指标。

The radar echo characteristics of a heavy hail occurred on September 15, 2013 in Shandong Province is analyzed by means of CINRAD/CD data from the Taishan radar station. The results indicate that Cyclone structure can determine the occurrence of hail in the case of poor Reflectance characteristics. To make further efforts to determine the hail, we can also look for Drape-like echo, Weak echo, Judgement of the vertical flow characteristics. It is a significant incase in vertically integrated liquid water or in Echo top Indicate the occurrence of a hail.