一种新的地面气压插值方案在计算低于模式地形的观测相当量中的研究  

A NEW SURFACE PRESSURE INTERPOLATION SCHEME FOR CALCULATION OF OBSERVATIONS-EQUIVALENT QUANTITIES LOWER THAN MODEL TERRAIN

作　　者：连治华[1] 薛纪善[1] 

机构地区：[1]中国气象科学研究院灾害天气国家重点实验室,北京100081

出　　处：《热带气象学报》2010年第4期489-493,共5页Journal of Tropical Meteorology

基　　金：国家重点基础发展计划(2004GB418306)资助

摘　　要：中国地形复杂,致使特定分辨率的模式地形与实际地形常存在一定差别。如何在复杂地形条件下设计数值预报模式中合理的地面气象要素的计算方案,对我国地面观测资料在中尺度数值模式中的充分应用有着非常重要的意义。利用GRAPES模式变量计算低于模式面的实际台站高度上的气压方案,采用基于静力平衡的气压外推方法计算地面气压,并与实际观测的地面气压进行比较,两者基本吻合。又利用新的计算方案讨论了地面气压观测的质量控制问题,新的质量控制方案大大扩充了目前地面资料在同化中的使用率。Since the topographic distribution of China is very complex, there exist elevation differences between the measurements from surface observation stations and numerical model outputs. The surface observation data are currently used only as backup or in process analysis, with insufficient use in numerical models. Reasonable calculation schemes of surface observation data are able to incorporate these data into numerical models sufficiently. In this paper, the prediction variables of GRAPES are interpolated to surface observations by a pressure extrapolation scheme for static equilibrium. Then the calculated surface pressures and surface observation data are compared. Most of the calculated surface pressures are consistent with the surface observations. Quality control in the observed surface pressure is discussed with the new calculation scheme and we can see that the surface observation data can be used much more efficiently than before.

关 键 词：数值天气预报 地面气压计算 静力平衡的外插方案 质量控制 

分 类 号：P456.7[天文地球—大气科学及气象学]