摘要
本文中考虑了云中垂直气流的湍流起伏,来計算云滴的碰并增长.发現在这种上升气流有起伏的环境下,同样大小的云滴在云中可以长成不同大小的較大云滴,包括降水胚滴和降水微元(雨滴),从而对暖性薄云如何形成降水給出一个此較合理的解释。
Taking consideration of the fluctuation in the vertical current,it is pointed out that the precipitation element Will form more easily in a shallow warm-cloud.Under the assumption that the frequency distribution of the vertical current is Gaussian,the growth rate of the cloud droplet is calculated for a simplified cloud model.The result shows that even in a cloud with 1 km thickness the precipitation elements of radius greater than 100μ could be formed under average condition.
作者
徐华英
顾震潮
HSU HUA-YING;KOO CHEN-CHAO(Institute of Geophysics and Meteorology,Academia Sinica)
出处
《气象学报》
1963年第1期108-114,共7页
Acta Meteorologica Sinica
