一次雹暴天气过程的天气特征及雷达图特征分析  

Weather characteristics of a hailstorm and its radar chart

作　　者：李鸾 汪茜林 周先春 

机构地区：[1]芜湖市气象局,芜湖241000

出　　处：《气象水文海洋仪器》2012年第4期37-41,共5页Meteorological,Hydrological and Marine Instruments

摘　　要：文章对发生在芜湖县的一次强对流天气进行了天气学分析、中尺度分析以及雷达图特征分析,确认此次雹暴天气由单个超级单体造成,并得出结论:此次过程天气背景为东北低涡和高空低槽;具有高低空急流、前倾槽、高空辐散低空辐合、上干下湿等不稳定环境条件;中尺度低层切变线和干线是触发强对流的主要影响系统,强垂直风切变、CAPE值、0℃层高度等因子有利于冰雹的产生;强对流在雷达图上表现了高VIL、高回波顶、中气旋以及悬垂回波、弱三体散射等明显的雹暴特征。This article discusses a severe convective weather occurred in Wuhu from the following analysis of synoptic meteorology,mesoscale and radar features.It is a certainty that the hailstorm is caused by single supercell storm.The conclusions show that the background of this weather process is northeast vortex and trough,which possess unstable environmental conditions of upper-low jet stream,forward-tilting trough,upper divergence and lower convergence,upper-layer dry and lowerlayer wet ;mesoscale shear line and dry line are the trigger to the severe convective weather,and the factors of strong vertical wind sheer,CAPE value and the height of 0℃layer are all conducive to the hail ;severe convective weather expresses in the radar chart with features of high VIL（vertically integrated liquid）,high echo tops,mesocyclone,echo pendency and weak three-body scattering etc.

关 键 词：冰雹 三体散射 雷达特征分析 

分 类 号：P415.2[天文地球—大气科学及气象学]