Spectral Modeling at the National Meteorological Center

Joseph G. Sela National Meteorological Center, National Weather Service, NOAA, Washington, DC 20233

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Abstract

A model with spectral representation in the horizontal and Arakawa quadratic conserving finite differencing in the vertical is formulated. The model includes a moisture cycle consisting of large-scale condensation processes, as well as a convective parameterization. Interactions with the underlying oceans include evaporation and sensible heating. Orography and surface friction are modeled and a semi-implicit time integration is employed. Experiments with global and hemispheric forecasts are described and evaluated.

Abstract

A model with spectral representation in the horizontal and Arakawa quadratic conserving finite differencing in the vertical is formulated. The model includes a moisture cycle consisting of large-scale condensation processes, as well as a convective parameterization. Interactions with the underlying oceans include evaporation and sensible heating. Orography and surface friction are modeled and a semi-implicit time integration is employed. Experiments with global and hemispheric forecasts are described and evaluated.

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