A severe storm that occurred over Beijing in northern China on 23 June 2011 was simulated with two different ice crystal parameterization schemes (the DeMott scheme and Meyers scheme) by using the Regional Atmospheric Modeling System. Compared with the DeMott scheme, the simulation results with the Meyers scheme have the following characteristics: (1) Updrafts are stronger and more numerous; (2) The cloud is better organized and contains a greater peak of ice-phase hydrometeor mixing ratios; (3) Cloud water and hail mixing ratios increase while graupel mixing ratios decrease; (4) The surface precipitation is initially greater. However, at the end of the simulation, less precipitation is produced. In short, the differences between the two schemes are not obvious, but the DeMott scheme has a relatively more reasonable result.
利用RAMS数值模式，研究了两种不同冰核参数化方案对2011年6月23日北京强风暴云微物理过程和降水特征的影响。与DeMott方案相比，Meyers方案具有如下特征：（1）上升气流更加旺盛；（2）云组织性更好，冰相水物质含水量峰值更大。（3）云水和冰雹混合比含量增加，但霰混合比含量减少；（4）初始地面降水增加，但模拟结束时，总降水量减少。总之，两种参数化方案的差别不是很明显，但DeMott方案更加合理。