一次华南静止锋上的mcs的云图特征及成因分析  

Satellite Cloud Characteristics of the MCS of A Stationary Front in Southern China

作　　者：李亚琴 

机构地区：[1]柳州市气象局,广西柳州545001

出　　处：《气象研究与应用》2011年第3期12-15,I0002,共5页Journal of Meteorological Research and Application

摘　　要：利用卫星云图及柳州Doppler雷达等资料,对2010年6月17-18日发生在桂西北局地性的一次强降雨天气过程进行分析,结果表明:(1)高原有小槽不断东移、超低空西南急流的建立为此次暴雨发生提供了有利的大尺度背景。(2)地面静止锋附近有明显的上升运动区存在,非常有利于中尺度对流的发生发展。(3)高水汽、高对流不稳定能量、低对流抑制能量和低抬升指数等有利的环境场为MCS的维持提供条件。(4)在卫星云图上MCS发展中会出现TBB<-80℃的核区,而强降水主要出现在核区南侧边缘。By using the satellite image, Liuzhou Doppler radar data, the strong rainfall weather happened on June 17-18, 2010 in north-west region of Guangxi is analyzed. The results show：（1） trough process A small moving eastward from plateau and south-west jet establishing in low altitude are both favorable to rainstorm in Large-scale background. （2）The upward motion near stationary front is conducive to the development of mesoscale convection. （3） High -moisture, strong convective instability energy, and weak convective inhibition energy and low uplift index help MCS maintain.（4）On the satellite images, there is TBB 〈-80 ℃ center area during MCS development. The heavy rainfall mainly occurs in the south of this center.

关 键 词：大暴雨 中尺度对流系统 云图特征 雷达 

分 类 号：P458.121[天文地球—大气科学及气象学]