1998年7月20～25日湖北暴雨中尺度对流系统的分析研究  

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

作　　者：吴庆丽[1] 郑永光[1] 李亚萍[1] 高慧琳[1] 李万彪[1] 

机构地区：[1]北京大学物理学院大气科学系暴雨监测和预测国家重点实验室,北京100871

出　　处：《北京大学学报（自然科学版）》2003年第1期51-57,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家重点基础学科研究 (G19980 40 90 7);高等院校重点实验室访问学者基金资助项目

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 0 7 2 0～ 2 5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分析诊断 ,还考察了GMS卫星红外云图云顶黑体温度 (TBB)分布与湖北 0 7 2 0～ 2 2日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。With 85.5?GHz microwave images of Tropical Rainfall Measuring Mission(TRMM) Satellite,which has good ability to monitor convective heavy rainfall,and GMS satellite infrared images in 1?h 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 for the development of the mesoscale convective systems in the Yangtze River basin.

关 键 词：1998年7月20-25日 湖北 中尺度对流系统 暴雨 卫星云图 暴雨落区 雨峰 

分 类 号：P458.1[天文地球—大气科学及气象学]