一次浅对流云人工消云试验的飞机和卫星观测研究

Aircraft and satellite observations of a shallow convective cloud dissipation test

本文利用2015年8月20日在山西定襄附近上空的实施一次有设计浅对流云的消云试验资料，结合极轨卫星观测资料，对一次浅对流云的发展和消散阶段进行分析。结果表明：此次探测区域内分布较为稀疏的浅对流云，探测的对流云粒子直径小于20μm，谱线单调下降，粒子数浓度约为10^2至10^3个，cm之间，具有大陆性云微物理特征，6μm以内粒子浓度在不同高度上相差不多，随着高度的增加，10μm以上粒子浓度逐渐增大，云顶温度较高，粒子有效半径较小，为典型的过冷水云，云内存在凝结增长和碰并增长机制；根据飞机观测结果，作业后，积云消散较为明显，云中粒子数浓度明显降低，作业有效。

Based on the testing data of a shallow convective clouds dissipation experiment designed in Shanxi Dingxiang on August 20, 2015, the characteristics of thedevelopment and dissipation phasea have been analysed with thepolar orbit satellite observation data. The results indicated that shallow convective clouds in the detection area were relatively sparse, and smaller than 20μ m in Diametre. Spectral linewas monotonous, and the particle number concentration between anbout 102 - 103 percm , wih continental cloud micre physical characteristics.Within 6μ m particle concentration in different height were similar, more than 10μ m particle concentration increased gradually with the increase of height. Genting temperature was higher,the particle effective radius were lesser, and the convective clouds were considered typical supercolled water clouds with the cloud condensation growth,touch and growth mechanism. According to the aircraft observations,cumulus clouds dissipated more obviously, and cloud particle number decreased significantly after the operation, which showed that the aircraft operation was effective.