甘南高原冰雹的气候特征和雷达回波分析  

Analysis on Climate Features and Radar Echo of Hail Weather in Gannan Plateau

作　　者：吉哲君 安华银 赵惠珍 罗王军 

机构地区：[1]甘肃省甘南藏族自治州气象局,甘肃甘南747000

出　　处：《现代农业科技》2016年第6期210-212,共3页Modern Agricultural Science and Technology

基　　金：甘肃省气象局课题"高原强对流天气雷达预报指标研究"

摘　　要：利用甘南州8个国家气象观测站1976—2015年冰雹观测资料,对甘南高原冰雹天气的气候特征进行详细分析。同时,利用2002—2012年5—9月合作站探空资料和2013—2015年甘南新一代天气雷达资料对甘南各站冰雹日层结特征和多普勒雷达回波特征进行统计分析。结果表明:甘南州冰雹随海拔高度的升高而呈线性增加趋势。20世纪80—90年代是降雹的高峰期,降雹总体趋势是减少的。一日中冰雹天气主要发生在午后至傍晚,冰雹天气当日合作站探空参数有明显的特征。甘南冰雹云回波强度>40 dbz,回波顶高度在3 km以上,垂直液态含水量在0.5 kg/m2,60%的冰雹云速度场有明显的辐合和中气旋。Used meteorological station hail observation data of Gannan in 1976--2015 to analyze the climate characteristics of Gannan Plateau hail weather,used cooperation standing sounding data in May to September at 2002--2012 in Gannan and a new generation of weather radar data of Gannan hail in 2013--2015 to analyze stratification and doppler radar echo characteristics. The results showed that the Gannan hail bad increase tendency with the rising of altitude. In the 1980s to 1990s the hail peak was down, the overall trend reduced.The hail oecured mainly in the afternoon to the evening.The hail weather cooperation standing sounding parameters had obvious eharacteristics.Gannan hail cloud echo intensity was 〉40 dbz, echo top height was above 3 km ,vertical liquid water content was in the 0.5 kg/m2,60% hail cloud velocity had obvious convergence and cyclone.

关 键 词：冰雹 气候特征 回波特征 甘南高原 

分 类 号：P429[天文地球—大气科学及气象学]