改进的MM4模式暴雨实例对比试验  

Numerical experiments of Heavy Rainfalls based on Different Model Algorisms

作　　者：葛孝贞[1] 李峰[1] 

机构地区：[1]南京大学大气科学系,南京210093

出　　处：《气象科学》1996年第2期96-109,共14页Journal of the Meteorological Sciences

基　　金：国家"八.五"攻关课题!85─906─03─05;85─906─04的资助

摘　　要：本文利用改进了水汽输送方案的中尺度模式MM4对三次暴雨过程作了试验，这三次过程包括两次长江中下游特大暴雨和一次华北暴雨。把三次暴雨过程的降水实况和采用不同水汽输送方案所得到的模拟降水结果进行了对比，并主要分析了“82．6”湖北特大暴雨过程。试验结果表明，MM4有较稳定的预报降水的能力，改进后的模式提高了对暴雨区、降水结构和暴雨雨团活动的预报能力，比原MM4的预报结果有了明显的改进，从而说明改进水汽输送方案是改进中尺度模式的一个重要途径。In this paper,the moisture transport algorism of mesoscale model MM4 is improved by adding positive definite moisture transport schemes with high accuray. This model is used to carry out numerical experiments in three heavy rainfalls. Predictions of different moisture transport schemes are compaed with the observations and “82.6” Hubei heavy rainfall is analysed. It is found that this model is able to improve prediction of heavy rainfall areas and precipitation structure. It is suggested that improving the moisture transport schemes is an effective way to find better mesoscale models.

关 键 词：水汽输送 输送格式 暴雨 试验 中尺度模式 

分 类 号：P458.121.1[天文地球—大气科学及气象学]