A Synoptic-Scale Wave of 6–9-Day Period in the Atlantic Tropical Troposphere during Summer 1981

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  • 1 Laboratoire de Météorologie Dynamique du CNRS, Ecole Polytechnique, Palaiseau, France
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Abstract

Using the ECMWF analyses, this study documents a tropospheric synoptic-scale wave in the tropical Atlantic during summer 1981. It has a 6–9-day period and a westward velocity of about 8.5° longitude per day. The wave structure has features similar to a mixed Rossby-gravity wave. It is suggested that it may be a normal mode of the earth atmosphere.

Abstract

Using the ECMWF analyses, this study documents a tropospheric synoptic-scale wave in the tropical Atlantic during summer 1981. It has a 6–9-day period and a westward velocity of about 8.5° longitude per day. The wave structure has features similar to a mixed Rossby-gravity wave. It is suggested that it may be a normal mode of the earth atmosphere.

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