甘肃罕见冰雹天气过程个例分析  

Analysis of an Infrequent Hail Event in Gangsu

作　　者：樊晓春[1] 马鹏里 董安祥[1] 董彦雄 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,兰州730020 [2]甘肃省平凉市气象局,平凉744000

出　　处：《气象科技》2007年第3期363-367,共5页Meteorological Science and Technology

基　　金：科技部社会公益研究专项"西北地区人工防雹消雹技术"(2002DIB10046);甘肃省气象局"十人计划"共同资助

摘　　要：针对2005年5月30日甘肃区域性罕见冰雹天气过程,结合天气实况、环流形势以及环境场特征,利用卫星云图和新一代天气雷达产品资料,分析了这次强冰雹天气过程的影响系统、云图和雷达回波演变过程,得到了冰雹云在雷达强度回波、速度回波和卫星云图中的特征,揭示了这次强冰雹不是带状冰雹云系移到本地产生的,而是发展成中β尺度(MβCS)的中尺度对流系统造成的。同时,得出了一些做好冰雹预报预警量化指标。The influencing systems and the developing process of a hail event occurred on 30 May 2005 in Gansu are analyzed with cloud and radar echo images in detail in combination with the actual weather situation, circulation pattern, and environmental fields. The characteristics of hail cloud echoes, velocity echoes and satellite cloud images are obtained. The findings conclude that the event was caused by a meso-β-scale convective system rather than a zonal hail cloud system. Some quantitative indexes are also achieved, which is meaningful to the operational hail forecast.

关 键 词：冰雹 环境场 卫星云图 雷达回波 

分 类 号：P458.121.1[天文地球—大气科学及气象学]