ASSIMILATION OF OBSERVED SURFACE WIND WITH GRAPES  

作　　者：丁杨 庄世宇 顾建峰 

机构地区：[1]Shanghai Weather Forecast Center [2]Chinese Academy of Meteorological Sciences

出　　处：《Journal of Tropical Meteorology》2010年第1期96-100,共5页热带气象学报（英文版）

基　　金：National Natural Science Foundation of China (40675064)

摘　　要：With the advances of numerical weather simulation and reduced data assimilation updating cycle, surface observation data assimilation becomes more and more important in data assimilation systems It is widely accepted that a better data assimilation system should contain the restriction of thermod^amic processes in the surface layer. Therefore, in this paper, a new surface wind observation operator is utilized in Global and Regional Assimilation PrEdiction System_3D-Variance （GRAPES_3D-Var）, with the restriction of thermodynamic process in the planetary boundary layer （PBL）. In order to research the ability of this new surface wind observation operator in assimilation and forecasting, a series of experiments are operated by using the GRAPES model. The main results indicate that this new method of surface wind observation operator has positive impact on the forecast with the GRAPES model.With the advances of numerical weather simulation and reduced data assimilation updating cycle,surface observation data assimilation becomes more and more important in data assimilation systems.It is widely accepted that a better data assimilation system should contain the restriction of thermodynamic processes in the surface layer.Therefore,in this paper,a new surface wind observation operator is utilized in Global and Regional Assimilation PrEdiction System_3D-Variance(GRAPES_3D-Var),with the restriction of thermodynamic process in the planetary boundary layer(PBL).In order to research the ability of this new surface wind observation operator in assimilation and forecasting,a series of experiments are operated by using the GRAPES model.The main results indicate that this new method of surface wind observation operator has positive impact on the forecast with the GRAPES model.

关 键 词：numerical weather simulation FORECAST surface wind data assimilation restriction of thermodynamie processes GRAPES 

分 类 号：P456.7[天文地球—大气科学及气象学]