贵州铜仁市春季冰雹天气特征及防雹预警阀值  

Hail Weather Characteristics and Hail Prevention Pre-warning Threshold Value in Tongren City of Guizhou Province

作　　者：方标 严小冬[1,2] 方可[3] 陈关清 罗晓松 杨群 茅海祥 

机构地区：[1]贵州省铜仁市气象局,贵州铜仁554300 [2]贵州省气候中心,贵州贵阳550002 [3]铜仁学院,贵州铜仁554300

出　　处：《贵州农业科学》2014年第3期212-218,共7页Guizhou Agricultural Sciences

基　　金：国家科技支撑计划"西南重大突发性自然灾害预警与防控技术研究与应用"(2012BAD20B06);贵州省科技厅社会发展攻关项目"贵州省干旱灾害风险评估研究"[黔科合SY字(2011)3091];贵州省气象局青年科技基金项目"多普勒天气雷达资料在铜仁市人工增雨中的应用研究"[黔气科合QN(2014)19]

摘　　要：为提高铜仁市春季冰雹天气的预报准确率,减小因冰雹天气给当地农业生产、生活带来的损失,利用铜仁市气象局雷达站常规观测资料及下属各区县气象观测站降雹观测记录,对2013年3月发生在贵州省铜仁范围内的3次冰雹天气的常用雷达产品特征进行定性、统计分析。结果表明:当雷达基本反射率因子强度≥50.0dBz、0℃层回波强度≥45.0dBz、径向速度场有辐合特征、垂直液态水含量≥20kg/m2,同时雷达产品连续出现冰雹指数标识"▲"、强天气概率达30%以上时,则判断有冰雹天气的出现。The common radar product characteristics was determined and analyzed statistically based on conventional observation data recorded by the Radar Station,Tongren Meteorological Bureau and the hail-falling observation recorded by different meteorological stations of Districts or Counties in Tongren Region during three hail weather events in March,2013 to improve hail forecast accuracy and reduce the loss in local agricultural production and life.The results showed that the hail weather would occur under the conditions of≥ 50 DBZ radar base reflectivity,≥ 45 DBZ echo intensity on the 0 ℃ layer,convergence characteristics in the radial velocity field and ≥20 kg/m2 vertical liquid water content,hail index logo“▲”on radar products continuously and ≥30% strong weather probability.The hail prevention pre-warning system established by the above conclusion can improve hail warning and forecasting efficiency and working performance of hail suppression greatly in Tongren region.

关 键 词：灾害天气 冰雹 雷达资料 防雹预警系统 贵州 

分 类 号：P426.64[天文地球—大气科学及气象学]