摘要
在原η坐标模式基础上,利用1995年8月23日和1998年4月28日四川西部两次强降水过程为例,通过改变水平分辨率和具有不同分辨率的地形资料,以及固定边界、单向影响嵌套边界,进行了一些数值试验。结果表明:(1)较低水平分辨率的η模式,采用较高分辨率的地形资料不一定能改善预报结果;(2)具有较高水平分辨率,并引入较高分辨率的地形资料,以及单向嵌套侧边界的η模式。
Based on a previous η coordinate model, some numerical experiments by the change of the horizontal resolution and the topography data of different resolution the solid boundary and one way nested boundary have been made for two heavy rain events in the West Sichuan on August 23, 1995 and April 28, 1998 respectively. The results show that (1) using the topography data with higher resolution the model with lower horizontal resolution cannot improve the prediction results and (2) the model with higher horizontal resolution, topography data of higher resolution and one way nested boundary can improve the prediction results more evidently.
关键词
Η坐标模式
高分辨
地形
边界
降水预报
数值试
coordinate model
high resolution
topography
boundary
precipitation forecast
numerical experiment
