【作者】 程正泉； 刘燕；

【Author】 CHENG Zhengquan LIU Yan Guangzhou Central Meteorological Observatory, Guangzhou, 510080

【机构】 广州中心气象台；

【摘要】 0604号强热带风暴登陆后造成极其严重的灾害,分析该次强降水过程,发现除了强盛的西南季风外,大陆高压也起着十分重要的作用。自高层向低层加强的大陆高压,其东南侧深厚的偏东北气流,与“碧利斯”登陆后西北象限的东北风相叠加,配合强盛的西南季风,使得“碧利斯”残涡以及槽区得以长时间维持。涡度收支表明,正是长时间维持的台风槽,其低层强烈的辐合效应,产生大量涡度,致使中尺度对流系统不断发展而造成连续强降水。更多还原

【Abstract】 Based on the analysis of this torrential rain event induced by BILIS(STS0604), which resulted in a severe calamity to South China after its landfall, results show that the continent high, besides the strong southwestern jet, also plays an important pole in the process. The deep northeastern stream at the southeastern side of the continent high, overlapping with the northeastern wind in the northwestern quadrant of BILIS after its landfall, and the strong southwestern jet lead to the long maintenance of the remnant low and the typhoon trough. The vorticity budget shows that it is the long existing typhoon trough whose intense convergence at the low level produces a large amount of vorticity, trigger the successive development of MCS and results in the continuous heavy rain.更多还原