中文摘要：

利用长春2007年5月16日的一次层状云降水过程的飞机观测资料,并结合天气图、卫星云图及雷达回波等资料,综合分析了此次降水过程中粒子浓度、粒子谱、雷达垂直累积液态水（vertical integrated liquidwater,VIL）、微波辐射计积分液态水（liquid water content,LWC）以及地面雨强特征。研究表明,层状云微结构在水平方向上的起伏较大,出现两次典型的含水量跃变：第1次液态水跃变主要是因为粒子浓度增加;第2次液态水跃变是因为粒子浓度和粒子谱共同作用的结果;雷达VIL值和地面雨强两者呈正相关。

英文摘要：

Using the aircraft observation data of a stratiform cloud precipitation process in Changchun on May 16,2007,combined with corresponding synoptic charts,satellite cloud photographs and radar echoes,the features of cloud droplet concentration,cloud droplet size distribution,radar vertically integrated liquid water（VIL）,integrated cloud liquid water of microwave radiometer and rainfall rate at the ground surface were comprehensively analyzed in this paper.The results show that the microphysical structure of stratiform clouds undulated greatly in the horizontal direction,showing two typical leaps of liquid water content;the first leap resulted from the increase in cloud droplet concentration,and the second leap from the increase in cloud particle concentration as well as the widening of cloud droplet size distribution.Besides the precipitation rate at the ground surface and radar VIL were positively correlated.