气象2017，Vol.43Issue(2)：129-140,12.DOI:10.7519/j.issn.1000-0526.2017.02.001
不同积云对流参数化方案对"7·21"北京特大暴雨模拟的影响
Simulation Contrast of Different Cloud Parameterization Schemes for the Extremely Severe Torrential Rainfall Event in Beijing on 21 July 2012
摘要
Abstract
Four cumulus convection parameterization schemes,i.e.,the Kain-Fritsch (KF),Betts-Miller-Janjic (BMJ),Grell-Devenyi (GD)and Simplified Arakawa-Schubert (SAS)schemes in the weather re-search and forecasting modeling system (WRF V3 .5 .1 version)are respectively used to simulate the severe torrential rain event in Beijing during 21-22 July 2012,particularly focusing on spatio-temporal features of convection bursts,and the impact factors of precipitation forecast.The results show that the simulated rainfall location and intensity by the KF scheme agree well with the observation while the BMJ scheme ex-aggerates the scope and intensity of the severe rainfall.The GD and SAS schemes have poor simulation re-sults.The initial burst states and evoluting process of convection in the four schemes are quite different, and the forecast time is also different.Generally speaking,KF scheme performs better in simulating con-vection burst and it can simulate a strong upward motion and abundant moisture during the severe torren-tial rain period.Meanwhile,the rainfall rates in the simulated deep convection area are relatively high with KF and BMJ schemes.However,the simulated precipitation by SAS scheme is dominated by the stratus cloud area and it is unable to work out the center of the severe rainfall.关键词
暴雨/WRF模式/微物理方案/积云对流参数化Key words
torrential rainfall/WRF model/microphysical parameterization schemes/cumulus convection分类
天文与地球科学引用本文复制引用
徐之骁,徐海明..不同积云对流参数化方案对"7·21"北京特大暴雨模拟的影响[J].气象,2017,43(2):129-140,12.基金项目
国家自然科学基金项目(41275094、41105042 和41490643)共同资助 （41275094、41105042 和41490643）
