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Forecast Skill Analysis for Hierarchical Time-stepping on CPAS

MPAS-A uses a global timestep (determined by the CFL condition on the smallest mesh cell) that substantially limits the resolution variation. The hierarchical time-stepping (HTS) feature implemented in ClusterTech Platform for Atmospheric Simulation (CPAS) relaxes this restriction by applying different time-steps to mesh cells of different sizes. This new feature enables extreme variable-resolution meshes and higher computational efficiency. This study evaluates the model results using HTS.

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