Improved Simulation of Summer Heavy Rainfall over Beijing and Henan by the YHGSM with Updated Subgrid Orographic Parameters

作     者：Yingjie WANG Jianping WU Kaijun REN Yingjie WANG;Jianping WU;Kaijun REN

作者机构：College of Computer Science and TechnologyNational University of Defense TechnologyChangsha410600China College of Meteorology and OceanographyNational University of Defense TechnologyChangsha410600China 

出 版 物：《Journal of Meteorological Research》 (气象学报（英文版）)

年 卷 期：2024年第38卷第3期

页      面：504-529页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：Supported by the National Natural Science Foundation of China(42375158 and 41875121) 

主　　题：subgrid orographic parameters orographic drag heavy rainfall Yin-He Global Spectral Model(YHGSM) parameterization 

摘      要：In numerical weather prediction(NWP),the parameterization of orographic drag plays an important role in representing subgrid orographic *** subgrid orographic parameters are the key input to the parameterization of orographic ***,the subgrid orographic parameters in most NWP models were produced based on elevation datasets generated many years ago,with a coarse resolution and low *** this paper,using the latest high-quality elevation data and considering the applicable scale range of the subgrid orographic parameters,we construct the orographic parameters,including the subgrid orographic standard deviation,anisotropy,orientation,and slope,that are required as input to the orographic gravity wave drag(OGWD)***,we introduce the newly constructed orographic parameters into the Yin-He Global Spectral Model(YHGSM),optimize the description of the orographic effect in the model,and improve the simulation of two typical heavy rainfall events in Beijing and Henan.