初始冰核浓度对冷云对流性降水影响的数值试验  

THE NUMERICAL TEST OF INITIAL ICE NUCLEI CONCENTRATION EFFECT ON COLD CLOUD CONVECTIONAL PRECIPITATION

作　　者：何宏让[1] 魏绍远[1] 刘晓明 

机构地区：[1]空军气象学院,南京211101 [2]空军宝鸡机场气象台,宝鸡721400

出　　处：《气象科学》1999年第1期43-49,共7页Journal of the Meteorological Sciences

基　　金：国家自然科学基金!49575243

摘　　要：本文利用二维滞弹性非静力平衡云模式［1］，通过改变初始冰核浓度，研究其对冷云对流性降水的影响。模拟结果表明：增大初始自然冰核浓度，对对流强弱和云状影响不大，但对云内的微观结构有很大的影响，即云内冰粒子提前产生，云冰和雪含量增大，并且可以削弱地面累积固态和液态降水量。并分析了导致这些结果的原因以及要削弱局地暴雨，必须初始播撒大量冰核的同时，增大初始云滴浓度（CCN）。A two-dimensional anelastic non-hydrostatic equilibrium cloud model has been used to simulate initial ice nuclei concentration affecting on cold cloud convective precipitation in this paper. The results indicate:When initial natural ice nuclei concentration is increased,it has no effect on convective intensity and cloud form,but it can change the cloud micro - physical structure greatly; make cloud ice particals formed early, and increase the content of cloud ice and snow in cloud,and it also can weaken the total accumulative solid and liquid precipitation on the ground. In addition,in order to weaken local storm rainfall,we can initially seed cloud droplet accompanying with adding the numbers of artificial ice nuclei.

关 键 词：冰核浓度 人工影响天气 数值试验 冷云 

分 类 号：P48[天文地球—大气科学及气象学] P435