Multi-Scale Weather/Climate Simulations with Coupled Non-hydrostatic Atmosphere-Ocean GCM on the Earth Simulator

The coupled non-hydrostatic atmosphere-ocean-land model has been developed in the Earth Simulator Center. Outline of the coupled model is introduced and its characteristics are presented. Results from preliminary validations including forecasting experiments are described. Progresses in model development from view points of numerical schemes and physical rain process are presented. After optimizing computational performance, performance analysis has been performed on the Earth Simulator. As the results of optimization, ultra high performance with the coupled non-hydrostatic atmosphere-ocean has been achieved. Computational performance of the coupled non-hydrostatic atmosphere-ocean model has attained about 52–55% of theoretical peak performance.