WRF模式物理过程参数化方案对黑河流域降水模拟的影响  

Effects of Parameterized Physical Process of WRF Model on Simulation of Precipitation in the Heihe River Basin

作　　者：朱庆亮 江灏[1] 王可丽[1] 雒新萍[1,2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《干旱区研究》2013年第3期462-469,共8页Arid Zone Research

基　　金：国家自然科学基金项目(91025005)资助

摘　　要：以黑河流域一次降水过程为研究个例,利用中尺度数值预报模式WRF 3.1进行物理过程参数化方案选择的分组敏感性试验,分别讨论了WRF模式中的微物理、积云对流、陆面过程和边界层参数化方案对黑河流域降水模拟的敏感性,并利用该流域内12个气象站的日降水资料进行了验证。研究表明:没有确定的某个物理过程参数化方案在所有试验方案中的模拟效果一致好,不同的参数化方案配合使用模拟效果更佳。对比分析模拟结果发现,要有效地模拟出降水中心位置和降水量、降水区分布形态和范围,应同时选用MYJ边界层参数化方案与Noah陆面过程参数化方案;微物理参数化方案中选择Ferrier方案时,对降水的模拟效果要好于选用WSM3、WSM5、Lin方案;积云对流参数化方案对降水模拟的敏感性明显弱于其他物理过程参数化方案。A rainfall event in the Heihe River Basin was taken as an experimental case, and the mesoscale WRF3.1 was applied to study the sensitivity of different parameterized schemes to rainfall simulation. Effects of the microphysies, cumulus convection, land surface processes and the planetary boundary layer in the WRF parameter- ized schemes on the sensitivity of rainfall simulation in the Heihe River Basin were discussed, and the simulated re- sults were validated with the observation data from 12 meteorological stations in the basin. The results showed that there was no single parameterized scheme to perform well in the simulation, and a combination of various parame- terized schemes would be better. The resuhs suggested that the center, value, distribution and extent of rainfall could be simulated well if the Mellor-Yamada-Janjic planetary boundary layer parameterized scheme and the Noah land surface process parameterized scheme were applied simultaneously. The results also suggested that the results simulated with Ferrier scheme were better than those with WSM3, WSM5 and Lin schemes. The sensitivity of cu- mulus convection parameterized scheme to the rainfall simulation was significantly lower than that of other schemes.

关 键 词：降水 物理过程 参数化方案 数值模拟 黑河流域 

分 类 号：P426.6[天文地球—大气科学及气象学]