The Coupling of Momentum Between Internal Gravity Waves and Mean Flow: A Numerical Study

Walter L. Jones National Center for Atmospheric Research, Boulder, Colo

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David D. Houghton National Center for Atmospheric Research, Boulder, Colo

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Abstract

A numerical model of internal gravity waves allows momentum transport by the waves to interact with the mean flow. Momentum deposited at a critical level develops a “shelf” in the mean flow. Mean flow acceleration Doppler-shifts the wave frequency, allowing more penetration of wave energy than expected from linear theory.

Abstract

A numerical model of internal gravity waves allows momentum transport by the waves to interact with the mean flow. Momentum deposited at a critical level develops a “shelf” in the mean flow. Mean flow acceleration Doppler-shifts the wave frequency, allowing more penetration of wave energy than expected from linear theory.

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