A Note on Mixed Resolution for Numerical Models

R. W. DALEY Dynamic Prediction Research Unit, Atmospheric Environment Service, Dorval, Canada

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Abstract

The hypothesis that a numerical model with variables of mixed spatial resolution is as accurate as one having variables of equally high resolution is tested using a global, barotropic, free-surface primitive-equations model and the spectral formulation of Bourke. It is found that models with some variables of high resolution and others of low resolution are superior to one having uniformly medium resolution.

Abstract

The hypothesis that a numerical model with variables of mixed spatial resolution is as accurate as one having variables of equally high resolution is tested using a global, barotropic, free-surface primitive-equations model and the spectral formulation of Bourke. It is found that models with some variables of high resolution and others of low resolution are superior to one having uniformly medium resolution.

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