NUMERICAL METHODS IN WEATHER PREDICTION: II. SMOOTHING AND FILTERING

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  • 1 Joint Numerical Weather Prediction Unit, Suitland, Md.
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Abstract

A method is developed for the design of finite-difference smoothing and filtering operators which meet pre-determined specifications, and which are applicable to automatic computing machinery. The general technique is to build complicated operators from the simplest types. The necessity for smoothing predicted fields of stream functions before inverting the balance equation for heights of isobaric surfaces is brought out.

Abstract

A method is developed for the design of finite-difference smoothing and filtering operators which meet pre-determined specifications, and which are applicable to automatic computing machinery. The general technique is to build complicated operators from the simplest types. The necessity for smoothing predicted fields of stream functions before inverting the balance equation for heights of isobaric surfaces is brought out.

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