A NOTE ON “KELVIN” WAVES IN THE ATMOSPHERE

JAMES R. HOLTON University of Washington, Seattle, Wash.

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RICHARD S. LINDZEN National Center for Atmospheric Research, Boulder, Colo.2

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Abstract

A special solution of the linearized equations for an equatorial β-plane is described. The meridional velocity is set identically zero and it is shown that the solution is a vertically propagating gravity wave in the x-z plane which is in geostrophic balance in the meridional plane. These waves are shown to be similar to Kelvin waves in a bounded ocean. Some implications of the atmospheric “Kelvin” waves for equatorial dynamics are discussed.

Abstract

A special solution of the linearized equations for an equatorial β-plane is described. The meridional velocity is set identically zero and it is shown that the solution is a vertically propagating gravity wave in the x-z plane which is in geostrophic balance in the meridional plane. These waves are shown to be similar to Kelvin waves in a bounded ocean. Some implications of the atmospheric “Kelvin” waves for equatorial dynamics are discussed.

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