New Version of the CMA-GFS Dynamical Core Based on the Predictor–Corrector Time Integration Scheme

作     者：Xueshun SHEN Yong SU Hongliang ZHANG Jianglin HU Xueshun SHEN;Yong SU;Hongliang ZHANG;Jianglin HU

作者机构：CMA Earth System Modeling and Prediction CentreChina Meteorological Administration(CMA)Beijing 100081 State Key Laboratory of Severe WeatherChinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081 

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

年 卷 期：2023年第37卷第3期

页      面：273-285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(42090032 and 42275168) 

主　　题：Global/Regional Assimilation and Prediction System(GRAPES) China Meteorological Administration global forecast system(CMA-GFS) predictor-corrector three-dimensional(3D)reference profile 

摘      要：The operational numerical weather prediction system established by the China Meteorological Administration(CMA),based on the Global/Regional Assimilation and Prediction System(GRAPES)model,adopts the classical semi-implicit semi-Lagrangian(SISL)time integration *** paper describes a major upgrade to the dynamical core of the CMA global forecast system(CMA-GFS),which was successfully incorporated into operation in *** the upgrade,the classical SISL is further developed into a predictor–corrector scheme,a three-dimensional(3D)reference profile instead of the original isothermal reference profile is applied when implementing the semi-implicit algorithm,and a hybrid terrain-following vertical coordinate system is also *** new version of the dynamical core greatly improves the model performance,the time integration reaches second-order accuracy,the time step can be extended by 50%,and the efficiency is greatly improved(by approximately 30%).Atmospheric circulation simulation is systematically improved,and deviations in temperature,wind,and humidity are *** new version of the dynamical core provides a solid foundation for further development of the entire operational system of the CMA.