摘要
为减轻夏季用电负荷,2004年我国许多省市实施了碘化银催化增雨降温作业。本文利用数值模拟方法讨论了强对流云(冰雹云)催化降温的机理。模拟结果表明,实施碘化银催化后,地面降雨量增加、降雹量减少、地面温度降低。催化使得云中冰晶、霰和雨水的含量增加,造成云雨蒸发、霰的融化(蒸发)及冰晶升华量增加,从而使空气温度降低。
Numerical simulations were conducted to understand the mechanism of silver iodide seeding on decreasing air temperature in convective clouds. The results show that accumulated rain on the ground is increased, hail decreased and air temperature near ground decreased as a result of seeding. Seeding caused increasing in cloud ice, graupel and rain water content. Air temperature is decreased as a result of increasing amounts in evaporation from cloud and rain water, melting and evaporation from graupel and sublimation from cloud ice by seeding.
出处
《气象科学》
CSCD
北大核心
2006年第1期47-52,共6页
Journal of the Meteorological Sciences
基金
南京大学人才培养基金项目资助
江苏省自然科学基金项目(编号:BK2004090)资助
关键词
对流云
碘化银
催化降温
云的微物理过程
Convective clouds Air temperature decreased by AgI seeding Cloud microphysics
