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Article Dans Une Revue Geophysical Research Letters Année : 2006

Global estimates of equatorial inertia-gravity wave activity in the stratosphere inferred from ERA40 reanalysis

Résumé

A new methodology is applied to ERA40 reanalysis in order to quantify large-scale inertia-gravity wave activity in the equatorial lower stratosphere. Both eastward and westward propagating waves are identified in the data set and a good agreement is found with previously published in situ observations. Global estimates of vertical fluxes of zonal momentum associated with such waves are obtained. Typical amplitudes of order 10-2 m2. s-2 suggest that the forcing of the Quasi-Biennial Oscillation by large-scale inertia-gravity waves is tantamount to that by Kelvin waves. This method can be used to document the space-time variability of the wave-activity in order to improve the wave-drag parameterizations in climate models.
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hal-04110142 , version 1 (05-06-2023)

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J. Le Sommer, H. Teitelbaum, V. Zeitlin. Global estimates of equatorial inertia-gravity wave activity in the stratosphere inferred from ERA40 reanalysis. Geophysical Research Letters, 2006, 33, ⟨10.1029/2005GL024873⟩. ⟨hal-04110142⟩
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