高分辨率η模式的数值试验  

A Numerical Experiment with the Higher Resolution η-Coordinate Model

作　　者：周祖刚[1] 张维桓[1] 郝为锋[1] 林乃实[1] 

机构地区：[1]空军气象学院,南京211101

出　　处：《大气科学》1999年第5期597-604,共8页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金;空司基础理论课题

摘　　要：针对中尺度地形对我国天气影响的重要性， 本文先后提高了 Ｒ Ｅ Ｍ 的水平和垂直分辨率， 并采用包络地形方法处理模式中尺度地形。运用常规报文资料得到初始场， 对１９９３ 年８ 月４ ～５ 日， １９９４ 年７ 月１２ ～１３ 日的两次大暴雨个例分别进行了数值试验。结果表明， 仅提高 Ｒ Ｅ Ｍ 的水平分辨率， 对降水预报有一定的改善， 但多报出了几个大暴雨中心； 而对模式水平及垂直分辨率同时提高后， 其降水场、形势场的预报有明显的改进和提高， 虚假降水中心消失。In order to research the important influence of the meso-scale topography for Chinese weather, an improvement has been made on the horizontal and vertical resolution of REM in order, and has simulated with the higher resolution model to the heavy rain cases of August 4th-5th,1993 and July 12th-13th,1994,using the routine data to get initial field and model orography by envelope method. Compared to the results of A, B, C model and observation, it is found that the precipitation forecast of B model has been improved a little than that of A model, and several pesudo-heavy rain centers have existed. After the horizontal and vertical resolution of REM have been changed, the precipitation and circulation pattern forecast of C model has been improved greatly than that of B model.

关 键 词：Η坐标 模式分辨率 包络地形 数值试验 降水预报 

分 类 号：P457.6[天文地球—大气科学及气象学] P435