两次冰雹过程多普勒天气雷达产品的对比分析  

Comparative Analysis of Two Hail Processes Based on Doppler Weather Radar Products

作　　者：丁小剑 唐明晖 陈德桥 

机构地区：[1]湖南省气象台,长沙410007 [2]衡阳市气象台,湖南衡阳421001

出　　处：《气象与环境科学》2010年第2期42-47,共6页Meteorological and Environmental Sciences

摘　　要：利用常规天气资料和长沙多普勒天气雷达产品,对2008年4月8日和2009年3月21日发生在湖南的两次春季冰雹天气对比分析发现:这两次过程前期形势均为500 hPa西风槽以阶梯槽的形势影响湖南,槽前配合有冷锋南下,锋前的西南倒槽明显发展,低槽、切变以及冷空气是其主要影响天气系统;通过雷达产品对比分析发现,4月8日过程是一次典型的超级单体过程,3月21日过程为一次强飑线过程,在降雹前VIL值均有明显的反应。In this paper,making use of conventional weather data and Changsha Doppler weather radar products,two hail processes took place on April 8,2008 and March 21,2009 in Hunan were analyzed and compared.The results show the situations in two processes are all 500 hPa westerly trough in the form of steps with a cold front southward before,and the southwest inverted trough develops obviously before the font.Low trough,shear and the cold air are the main impact systems.The conclusion is that the process on April 8,2008 is a typical super-cell process while the process on March 21,2009 is a strong squall line process.The VIL values before the hail falling all have obvious response.

关 键 词：冰雹 多普勒天气雷达 超级单体 飑线 三体散射 

分 类 号：P458.121.2[天文地球—大气科学及气象学]