大气科学2011，Vol.35Issue(2)：272-286,15.
人工消除冷雾的个例模拟分析
Numerical Simulation of the Cold Fog Dissipation
摘要
Abstract
Based on the dynamic frame of mesoscale model MM5 and Reisner2 explicit cloud scheme, a LN (liquid nitrogen) -seeding scheme was developed and used to simulate the cold fog dissipation for the cold fog event on 26 December 2007 in Beijing area. The seeding effect and the physical mechanism were studied. Furthermore, two sensitive experiments were performed to study the seeding effect under different seeding distances and seeding amounts.The results indicate that when the seeding operation lasts 10 min at seeding rate of 5 g/s with distance being about 1 - 2 km on the upwind side of the target area, the seeding effect in the target area begins to appear at 9 min after seeding operation and the best effect appears at 24 min after seeding operation, the seeding effect can last about 20 min. The microphysical mechanism of the cold fog dissipation is because of the depletion of the water vapor due to the ice sublimation growth induced by seeding, which leads to the decrease of the water vapor condensation into fog droplets, meanwhile the decrease of the fog advection from the upstream region after seeding operation also contributes to the fog dissipation. In this case, seeding operation at seeding rate of 15 g/s with distance being about 5 - 6 km on the upwind side of the target area can make the target area have the most significant improvement in the visibility.关键词
冷雾/消雾/中尺度催化数值模式/机理/催化效果Key words
cold fog/fog dissipation/ mesoscale cloud-seeding model/ physical mechanism/ seeding effect分类
天文与地球科学引用本文复制引用
何晖,郭学良,李宏宇,金华,刘建忠..人工消除冷雾的个例模拟分析[J].大气科学,2011,35(2):272-286,15.基金项目
国家"十一五"科技攻关项目2006BAC12B04,公益性行业(气象)科研专项项目GYHY200806001-1 （气象）
