GRIST(Global-Regional Integrated Forecast System)is a next-generation unstructured-grid unified weather-climate modeling system,independently designed and developed by Chinese model development team during recent years.The model adopts a standardized and modular software architecture.It has the features such as unified hydrostatic and nonhydrostatic modeling,flexible and adjustable resolution,and multiple physical packages.Therefore,it can satisfy the computing demands of various spatial and temporal scales,ranging from weather forecasts to long-term climate simulations.The model framework system consists of the infrastructure layer and the model operating layer,and the epitaxial function includes the pre-processing layer and the data diagnosic layer.The modules in each layer have flexible design functions.The preliminary application of the modeling system shows that GRIST can meet the operational needs both from weather modeling and from climate modeling,demonstrating a forceful implementation of unified weather-climate model development.
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