Abstract: Tests of a balance model based on potential vorticity inversion are performed for shallow water flow over mountains. Idealized flows are assumed with Rossby numbers in the range 0.1?0.4. Flow evolutions with forecast times ...

Abstract: The prognostic equations for the total angular momentum vector M are derived for f- and ?-plane geometries and compared to those of spherical models. It is shown that the omission of the centrifugal effects and the ...

Abstract: A shallow inversion layer with southeasterly outflow and a cyclonic vortex in the troposphere are the basic characteristics of the Antarctic mean circulation. An attempt is made to model this pattern in a two-layer ...

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Abstract: Coriolis terms proportional to cosφ are omitted in the conventional theory of inertial motions, which predicts horizontal oscillations of frequency f for f-plane geometries in the absence of horizontal and vertical pressure ...

Abstract: The mechanism of baroclinic instability in the Eady model is interpreted by explicitly calculating the ageostrophic circulations related to the model?s hyperbolic basic functions. It is advantageous to perform the analysis ...

Abstract: Piecewise potential vorticity inversion (PPVI) aims at an interpretation of the interaction of potential vorticity (PV) anomalies q. The total flow domain D is divided into subdomains D1 and D2 with q1 and q2 as PV anomalies. ...

Abstract: The spurious numerical generation and/or destruction of various types of entropies in models is investigated. It is shown that entropy s? of dry matter tends to be generated if potential temperature is advected by a damping ...