【摘要】 利用合肥、武汉和长沙雷达、云顶亮温TBB等观测资料,对2003年7月8日发生的大暴雨天气过程进行了联合估计。结果表明:联合估算降水很好地再现了这次降水过程;卫星估算降水很大程度上弥补了雷达估算降水在空间分布上的不足,但对特大暴雨在强度上估计不足,对中等强度的降水估计偏大;引入雷达对卫星估算降水进行联合估算,能很好地反映暴雨云团的中尺度结构特征,反演的降水场能很好揭示强降水过程的时空变化特征。更多还原

【Abstract】 The cloud top temperature data(TBB) and radar data from Hefei,Wuhan and Changsha are used to estimate the precipitation of a rainstorm event occurred on 8 July 2003.The result shows that the joint estimation method can describe this event well;the satellite data makes up the lack of radar data on space distribution;but the satellite estimation underrates the intensity of extraordinary heavy rainfall(daily precipitation greater than 200 mm) while overrates that of moderate intensity rainfall.When the radar data are combined with satellite data,the estimation result can express well the meso-scale structure features of the rainstorm cloud cluster,and the estimated precipitation field can reveal the space-time distribution features of the severe rainfall event.更多还原