Longitudinal variation of the stratospheric quasi-biennial oscillation

Hamilton et al examine in a detailed general circulation model simulation and in the limited observations available the longitudinal dependence of interannual variations of tropical stratospheric wind. A version of the SKYHI model is run with an imposed zonally symmetric zonal momentum source that f...

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Bibliographic Details
Published in:Journal of the atmospheric sciences 2004-02, Vol.61 (4), p.383-402
Main Authors: HAMILTON, Kevin, HERTZOG, Albert, VIAL, Francois, STENCHIKOV, Georgiy
Format: Article
Language:English
Subjects:
Atmospheric circulation
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Stratosphere
Wind
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Summary:Hamilton et al examine in a detailed general circulation model simulation and in the limited observations available the longitudinal dependence of interannual variations of tropical stratospheric wind. A version of the SKYHI model is run with an imposed zonally symmetric zonal momentum source that forces the zonal-mean zonal wind evolution in the tropical stratosphere to be close to an estimate of the observed zonal wind based on radiosonde observations at Singapore during the period 1978-99. The net result is a significantly weaker peak-to-peak amplitude of the quasi-biennial oscillation in zonal wind over the South American sector than over the rest of the equatorial band.
ISSN:0022-4928
1520-0469
DOI:10.1175/1520-0469(2004)061<0383:lvotsq>2.0.co;2