2006年6月28日强对流天气过程中风垂直切变分析  

Analysis of Vertical Wind Shear in Severe Convective Storm on June 28,2006

作　　者：吴非洋[1] 曲楠[2] 马红云[1] 周红俊[2] 

机构地区：[1]南京信息工程大学,南京210044 [2]河南省大气探测技术保障中心,郑州450003

出　　处：《气象与环境科学》2008年第B09期30-33,共4页Meteorological and Environmental Sciences

摘　　要：利用天气图资料和物理量场,分析了2006年6月28日河南省强对流天气过程中风的垂直切变的形成和作用,结果表明:本次过程受前倾槽系统影响,伴随着对流层上部冷空气暴发,高空强风带向下扩伸,出现了明显的风的垂直切变。高层降温和高层冷平流,使大气层结趋向不稳定,不稳定能量聚集。当高空强风带高度下降,促使风的垂直切变加强,上层空气的动能向下迅速减小,失去的动能转化成使下层空气产生扰动的动能;下层扰动加强,有利于产生或增强上升运动,触发不稳定能量的释放,并引起流场绕水平轴的涡旋运动,从而导致强对流特别是雹暴的形成和发展。Based on weather chart and physical parameter diagnostic analysis, the vertical wind shear in deep convection storm on June 28, 2006 is analyzed. It shows that an out - burst of cold air in upper troposphere and downward continuation of high - level jet stream are responsible for the formation and development of the vertical wind shear. In the meantime, the atmosphere is tending to be instable; the lower- level disturbance is increasing. Hence the intensifications of ascending motion and the vortex motion of moving round the horizontal axis made great contribution to the happening and development of the hailstorm.

关 键 词：强对流 风的垂直切变 急流 对流层上部冷空气暴发 

分 类 号：P458.3[天文地球—大气科学及气象学]