摘要
本文根据降水过程中水汽条件和垂直运动条件,推导出降水效率一种计算公式。用该公式计算华南前汛期锋面云系自然降水效率,并探讨人工播云的可能性。结果表明,华南前汛期锋面云系自然降水效率不高(平均54.58％左右)。人工播云后降水效率平均达64.71％左右,相对增加17.42％(<0.05)。所以通过人工播云,促进云中微物理过程,可以提高降水效率,达到增雨目的。
In this paper, based upon the conditions of vapour and vertical motion in the precipitation process, a formula for calculating precipitation efficiency was derived. The formula was used to calculate the precipitation efficiency and the precipitation stimulation possibility of frontal clouds du-ring the first rainy season in South China. The results showed that the precipitation efficiency in natural state is lower (about 54. 58% in average), However, it is increased to abo.ut 64. 71 % with seeding, with a relative increase of 17. 42% (a<0. 05). Therefore, it is feasible to enhance precipitation efficiency and to realize precipitation enhancement on the ground by seeding.
出处
《热带气象》
CSCD
1990年第4期365-371,共7页
基金
国家气象局云雾基金课题的成果
