南海热带气旋0809号“北冕”对华南天气的影响

Impact of No.0809 Tropical Cyclone KAMMURI on South China Sea

使用常规探测资料、NCEP全球再分析资料和FY2C红外云图,分析2008年09号热带气旋"北冕"的活动情况及其对华南天气的影响。结果表明,在南海生成的热带气旋"北冕"维持时间较短,强度较弱,但在华南沿海2次登陆,产生的强降水和雷暴天气对华南中部和西部沿海地区影响极大。在登陆前,热带气旋外围的水汽输送带与大陆上东移的弱冷空气遭遇,激发出强烈的雷暴影响华南沿海地区;在登陆时和登陆后,在热带气旋中心和由于弱冷空气侵入形成的热带气旋内部的中尺度切变线附近产生的强降水和雷暴天气影响热带气旋中心经过的区域和北部湾地区。

Based on meteorological observation data and NCEP reanalyzed data,the tropical cyclone of KUMMURI was analyzed about the activity and influence on South China Sea.It showed that the influence of the strong precipitation and thunderstorm on coastal area of South China Sea was severe even KUMMURI was weak.Before landing,severe thunderstorm was brought about as water vapor of peripheral of tropical cyclone and weak cold air;during and after landing,strong precipitation and thunderstorm was produced by mesoscale shear line in the tropical cyclone.