[A-AS08] Weather, Climate, and Environmental Science Studies using High-Performance Computing

[AAS08-07] An Overview of the Development of a Unified Weather-Climate Model System (GRIST) in China

★Invited Papers

*Yi Zhang^1,2, Jian Li², Xiaohan Li^1,2, Zhuang Liu³, Xinyao Rong⁴, Yihui Zhou², Xindong Peng⁴, Yiming Wang¹, Rucong Yu² (1.PIESAT Information Technology Co. Ltd., 2.Chinese Academy of Meteorological Sciences, 3.Department of Earth System Science, Tsinghua University, 4.CMA Earth System Modeling and Prediction Center)

Keywords:NWP and climate models

Global-Regional Integrated forecast SysTem (GRIST) is a unified weather–climate model system. It was initially created in response to the requirement for, and calls to develop, unified weather and climate modeling in China. This “unification” process was pursued following two routes: (i) maximizing the possibility of constructing weather and climate models using a single model framework and dynamical core; (ii) maximizing the possibility of using a unified model formulation which requires minimal application-specific changes for weather-to-climate forecast applications that are relevant to most operational business demands. This presentation gives a review on the general features of the model framework, its dynamical core and physics-dynamics couping. Model applications from typical global AMIP climate simulations, operational numerical weather prediction, and high-resolution experimental global storm-resolving simulations are presented and discussed. Future model development and application efforts will be briefly outlined.