福建省近期登陆台风的中尺度暴雨与中尺度对流云团相互关系的综合分析

The correlations of meso-scale storm rainfall and meso-scale convective cloud cluster of the five typhoons landed at Fujian during the recent years

本文选取1996～1998年5个登陆福建台风，分析其中尺度暴雨时空分布规律；并通过对数字化处理的逐时红外卫星云图的研究，揭示台风中尺度对流系统发生发展的云图特征。分析表明台风中尺度暴雨的强度与中尺度对流云团的最冷云区温度和面积密切相关，常出现在中尺度对流云团偏东侧具有云顶温度梯度密集，云顶温度等值线曲率较大、云团处在发展阶段这些云图特征的区域。本文分析结果可为台风中尺度暴雨的短时预报方法的建立提供依据和帮助。

In this paper, the time and space distributive regularity of meso-scale storm rainfall in five-selected typhoons which landed at Fujian from 1996 to 1998 has been analyzed. And from the every-hour digitized satellite infrared photographs,the features of the meso-seale convective system is researched when it broke out and developed. It indicates that the intensity of the meso-scale storm is quitely connected with the temperat ure and the area of the coldest- cloud cluster. The heavy rainfall usually emerged within the eastern of the meso-scale convective cloud cluster where the cloud mass is developing and with a dense gradient and big curvature of the cloud top temperature outline. And this conclusions will be helpful and provide a reference for the ultra-short term forecast of meso-seale storm rainfall within typhoon.