一个三重嵌套的中尺度模式及暴雨模拟试验  

A TKIPLE NESTED MESOSCALE MODEL AND THE NUMERICAL SIMULATION FOR HEAVY RAIN

作　　者：郑国安[1] 郭肖容[1] 

机构地区：[1]国家气象中心

出　　处：《应用气象学报》1995年第2期129-137,共9页Journal of Applied Meteorological Science

基　　金：中国气象局强风暴开放实验室和"八五"项目共同资助

摘　　要：该文介绍了新近发展的一个高分辨率有限区模式（ＨＬＡＭ）．它是通过三重嵌套在现有计算机（ＣＹＢＥＲ－９９２）条件下实现的，其范围、地理位置及侧边界宽度均设计为灵活可变，尤其水平分辨率可按任意倍数提高。利用水平分辨率为５０ｋｍ左右的模式版本进行了实际资料的降水个例实验。结果是令人鼓舞的：（１）与嵌套的低分辨率（格距增大４倍）模式预报比较，不论低压中心位置、强降水落区、雨带走向及降水中心位置的预报都更接近实况；（２）高分辨率模式积分区域虽然缩小，但并未影响预报效果，其４８小时预报仍有较高精度。初步试验表明，进一步完善和改进后的ＨＬＡＭ完全可以发展为一个用于中尺度研究及业务使用的高分辨率区域模式。A triple nested High resolution Limited Area Model(HLAM)is recently developedand runs on computer CYBER-992. The model’s domain,geographical location、 lateralboundary width,especially horizontal resolution are highly flexible.Acase of heavy rainis simulated using this model with horizontal resolution of 50km. The results areencouraging:(1)The location of low pressure centers、the area of heavy rainfall and thetrend of rain- band are more closer to those of analysis as compared with low resolutionnested grid model. (2)Although the area of high resolution model’s simulation isreduced, the forecast effect is not influenced and 48 hour forecast still has highprecision. Preliminary experiments show that HLAM can be developed into a regional highresolution model for mesoscale research and operational forecasts.

关 键 词：三重混合嵌套 中尺度模式 暴雨 模拟试验 

分 类 号：P458.121.1[天文地球—大气科学及气象学] P426.62