Abstract: This article is addressed to the layman with a science education. It is thus not addressed specifically to the meteorologist, but it contains certain information about the weather services, and the impact of numerical ...

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Abstract: Excessive errors are committed in grids, in which mesh-lengths in the longitudinal direction are preserved in polar regions, if the hydrodynamic equations written in spherical coordinates are directly transformed into ...

Abstract: The first modern numerical weather prediction (NWP) models were developed for the computer that was announced in 1932 at the Institute for Advanced Study, in Princeton, New Jersey. Within 3 yr three agencies of the United ...

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 ...

Abstract: Two methods of solving the balance equation are outlined. Both methods have been used successfully on a daily operational basis at the Joint Numerical Weather Prediction Unit for a period of more than a year. Solutions ...

Abstract: The physical inconsistency of geostrophic flow and small surface pressure tendencies is discussed. The frequently disastrous consequences in conventional geostrophic barotropic predictions are numerically identified by ...

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Abstract: Numerical experimentation with various finite difference formulations of a particular set of differential equations incorporating a map scale factor indicates that the stability of the calculations is as dependent upon the ...

Abstract: A primitive-equation free-surface barotropic model was designed for the tropical belt. By the use of Shuman's difference system, experiments were made to test the effect of both approximate and correct boundary conditions ...