Comments on “The Equations of Motion for a Shallow Rotating Atmosphere and the ‘Traditional Approximation’”

Roald K. Wangsness Institute of Geophysics and Planetary Physics, University of California, San Diego

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Abstract

Accurate equations of motion are obtained for approximate velocity components thought to be suitable for motions near the surface of a sphere of constant radius. The problems raised by Phillips concerning similar equations are resolved, and it is shown that the “traditional approximation” is not associated with purely geometric consequences of small displacements about a large radius.

Abstract

Accurate equations of motion are obtained for approximate velocity components thought to be suitable for motions near the surface of a sphere of constant radius. The problems raised by Phillips concerning similar equations are resolved, and it is shown that the “traditional approximation” is not associated with purely geometric consequences of small displacements about a large radius.

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