A three-dimensional simulation of the equatorial quasi-biennial oscillation

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Abstract

A simulation of the equatorial quasi-biennial oscillation (QBO) has been obtained using a three-dimensional mechanistic model of the stratosphere. The model is a simplified form of the NCAR CCM (Community Climate Model) in which the troposphere has been replaced with a specified geopotential distribution near the tropical tropopause and most of the physical parameterizations have been removed. A Kelvin wave and a Rossby-gravity wave are forced at the bottom boundary as in previous one- and two-dimensional models. The model reproduces most of the principal features of the observed QBO, as do previous models with lower dimensionality. The interaction of the Rossby-gravity waves with the Kelvin waves results in about twice as much easterly compared to westerly forcing being required in order to obtain a QBO. -from Authors

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Takahashi, M., & Boville, B. A. (1992). A three-dimensional simulation of the equatorial quasi-biennial oscillation. Journal of the Atmospheric Sciences, 49(12), 1020–1035. https://doi.org/10.1175/1520-0469(1992)049<1020:ATDSOT>2.0.CO;2

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