锦州市冰雹天气分布特征及雷达预警指标研究

Research on Hail Weather Distribution Characteristics and Radar Warning Index in Jinzhou City

本文通过对2003—2017年发生在辽宁省锦州市的41次冰雹天气过程进行分析,得出锦州市冰雹天气分布规律,并确定锦州市冰雹天气雷达预警指标。结果表明:2003—2017年,锦州市冰雹日数呈总体减少的趋势;锦州冰雹次数的年变化较大,年平均出现2.7个冰雹日;锦州市冰雹天气总体呈现出南多北少的特征,局地性很强;冰雹天气雷达预警指标主要为回波强度大于50 dBZ、回波顶高超过11 km、垂直累积液态水含量超过35 kg/m^(2)。

Based on the analysis of 41 hail weather processes in Jinzhou City from 2003 to 2017,the hail weather distribution law in Jinzhou City was obtained,and the hail weather radar early warning index in Jinzhou City was determined.The results show that: from 2003 to 2017,the number of hail days in Jinzhou City showed an overall decreasing trend;The annual variation of hail frequency in Jinzhou is large,with an annual average of 2.7 hail days;The hail weather in Jinzhou City generally shows the characteristics of more in the South and less in the north,with strong locality;The early warning indexes of Hail Weather Radar mainly include echo intensity greater than 50 dBZ,echo top height more than 11 km,and vertical cumulative liquid water content more than 35 kg/m^(2).