Analysis of Mesoscale Convective System in Hubei Province Heavy Rainfall during July 20～25, 1998

Abstract

Abstract: With 85.5GHz microwave images of Tropical Rainfall Measuring Mission(TRMM) Satellite, which has good ability to monitor convective heavy rainfall, and GMS satellite infrared images in 1h interval, the mesoscale convective systems in Yangtze river basin during July 20～25, 1998 was revealed and analyzed. The relationship between the distribution of heavy rainfall and the blackbody temperature(TBB) of GMS satellite infrared images was examined. The results suggest that the mesoscale features of the heavy rainfall was outstanding, and the maximum rainfall peak took place at the time when the MCS just developed to the meso-β scale. The diagnosis of the large-scale environment suggested that the thermal and dynamic conditions were favorable to the development of the mesoscale convective systems in the Yangtze River basin.

Key words: mesoscale convective System, heavy rainfall, satellite, diagnosis

摘要： 利用对低纬度地区的对流性降水有较好监测能力的热带测雨卫星(TRMM)微波成像仪的85.5GHz资料，和GMS逐时红外卫星云图资料，分析了1998-07-20～1998-07-25长江中下游地区湖北省附近的中尺度对流系统的活动，并对其发生的环境条件进行了客观诊断分析，还考察了GMS卫星红外云图云顶黑体温度(TBB)分布与湖北07-20～07-22暴雨落区及雨峰之间的关系。结果表明，这次暴雨过程具有明显的中尺度特征，暴雨落区及雨峰与中尺度对流系统发展的初期有较好的联系。

关键词: 中尺度对流系统, 暴雨, 卫星, 诊断

CLC Number:

P425

WU Qingli,LI Yaping,GAO Huilin,ZHENG Yongguang,LI Wanbiao. Analysis of Mesoscale Convective System in Hubei Province Heavy Rainfall during July 20～25, 1998[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

吴庆丽, 李亚萍, 高慧琳, 郑永光, 李万彪. 1998年7月20～25日湖北暴雨中尺度对流系统的分析研究[J]. 北京大学学报（自然科学版）.

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Analysis of Mesoscale Convective System in Hubei Province Heavy Rainfall during July 20～25, 1998

1998年7月20～25日湖北暴雨中尺度对流系统的分析研究

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