Abstract
A two-dimensional numerical simulation of mid-latitude squall lines is used to study the properties of storm-induced stratospheric gravity waves. Owing to the tendency for convective cells to form at the forward edge of a squall line, and then propagate toward the rear, the simulated storms preferentially generate gravity waves that propagate toward the rear of the storm. This anisotropy in gravity wave generation leads to a net vertical transfer of momentum into the stratosphere. Cases with and without stratospheric mean wind shear are compared. In the latter case Doppler shifting of the waves to lower frequencies leads to wave breaking and enhanced wave — mean-flow interaction.
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© 1993 Springer Science+Business Media Dordrecht
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Holton, J.R., Durran, D. (1993). Convectively Generated Stratospheric Gravity Waves: The Role of Mean Wind Shear. In: Thrane, E.V., Blix, T.A., Fritts, D.C. (eds) Coupling Processes in the Lower and Middle Atmosphere. NATO ASI Series, vol 387. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1594-0_12
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DOI: https://doi.org/10.1007/978-94-011-1594-0_12
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