Statistics – Methodology
Scientific paper
Apr 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3307810l&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 7, CiteID L07810
Statistics
Methodology
7
Atmospheric Composition And Structure: Middle Atmosphere: Energy Deposition (3334), Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342), Atmospheric Processes: Global Climate Models (1626, 4928), Atmospheric Processes: Tropical Meteorology
Scientific paper
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.
Le Sommer Julien
Teitelbaum Hector
Zeitlin Vadim
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