安阳区域冰雹天气雷达回波特征分析

摘要

The comprehensive analysis on radar echo characteristics of hail weather were studied based on 7l4 radar observation data and factual information of Anyang City in the year of 2004~2009,by using statistics and comparative methods.The results showed that： the convection cell from Shexian County to Linzhou northwest region invaded Linzhou City after being merged.The migration path of heavy hail cloud was basically from northwest to southeast.Hail cloud has been distinguished by the difference between echo top height h and 45 dBz echo top height h45,when the h-h45 less than 1.5 km,it was heavy hail cloud;1.5 km h-h45 ≤ 2.0 km,it was medium hail cloud;2.1 km h-h45≤3.0 km,it was weak hail cloud;h-h45 3.0 km,it was thunder clouds.%利用安阳市2004—2009年的714雷达观测资料和实况资料,运用统计和对比的方法,对安阳市冰雹天气雷达回波特征进行综合分析。结果表明：源于山西涉县到林州西北部一带生成的对流单体,合并加强后沿涉县与平顺交界南段入侵林州市,强冰雹云移动路径基本为西北—东南方向,基本沿太行山东麓呈西北—东南贯穿林州市,在RHI上依据回波顶高度h与45 dBz回波顶高h45的差距识别冰雹云,当h-h45≤1.5 km时,为强冰雹云,当1.5 km3.0 km,为雷雨云。