福建古田积云降水及其人工催化的数值模拟

NUMERICAL SIMULATION OF CUMULUS PRECIPITATION AND ARTIFICIAL SEEDING IN GUTIAN AREA, FUJIAN PROVINCE

摘要:

本文用一维半时变积云模式模拟了福建古田水库地区积云的自然降水及人工催化对积云降水和地面雨滴谱的影响。计算结果表明:通过播撤,云上部冰晶增加。120分钟后,地面总降水量比自然云增加了0.5毫米,相对增雨量7.1%。文中还讨论了增雨机制,对AgI的播撒剂量作了一些数值试验,并与本区实测的雨滴谱、雨强等进行了比较。

Abstract:

Effects of cumulus precipitation and artificial seeding on the rainfall and raindrop size are simulated in Gutian area, Fujian province in terms of a one-and-a-half-dimensional time-dependent icebearing cumulus model. It is shown that 120 mimutes after the ice crystals increase at the upper layer of clouds upon seeding, the total rainfall will increase by 0.5mm and its relative increment by 7.1%. The mechanism of the increased rainfalI is also discussed in the paper. In addition, experiments are made in the AgI seeding amount for the comparison of the raindrop size and rain intensity in this area.