Development of 1km-Scale Operational Model in South China  

作　　者：CHEN Zi-tong DAI Guang-feng WU Kai-xin ZHONG Shui-xin XU Dao-sheng 陈子通;戴光丰;吴凯昕;钟水新;徐道生(Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction,CMA,Guangzhou 510641 China)

机构地区：[1]Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction,CMA,Guangzhou 510641 China

出　　处：《Journal of Tropical Meteorology》2021年第4期319-329,共11页热带气象学报（英文版）

基　　金：National Key R&D Program of China(2018YFC1506901);National Natural Science Foundation of China(U18114641010846)。

摘　　要：To support short-range weather forecasts,a high-resolution model(1km)is developed and technically upgraded in the South China Regional Center,including the improvement of the 3D reference scheme and the predictor-corrector method for semi-implicit semi-Lagrangian(SISL)in model dynamical core,as well as the improvement of physical parameterization.Furthermore,the multi-process parallel I/O and parallel nudging techniques are developed and have facilitated rapid updating in the assimilation prediction system and fast-output post processing process.The experimental results show that the improved 3D reference scheme and upgraded physic schemes can effectively improve the prediction accuracy and stability with a longer integration time step.The batch test shows that the precipitation forecast performance of 1-km model is significantly better than that of 3-km model.The 1-km model is in operation with a rapidly updating cycle at 12-minute intervals,which can be applied to short-range forecasts and nowcasting.

关 键 词：numerical weather prediction reference atmosphere semi-implicit semi-Lagrangian rapidly updating cycle short-range forecast 

分 类 号：P456.7[天文地球—大气科学及气象学]