Tropospheric and equatorial influences on planetary-wave amplitude in the stratosphere

Details Tropospheric and equatorial influences on planetary-wave amplitude in the stratosphere Tropospheric and equatorial influences on planetary-wave amplitude in the stratosphere

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29b...6h&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 2, pp. 6-1, CiteID 1019, DOI 10.1029/2001GL013762

Physics

3

Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics (0341, 0342), Meteorology And Atmospheric Dynamics: Stratosphere/Troposphere Interactions

Scientific paper

Using 49-year NCEP/NCAR reanalysis data we examine two possible factors affecting the amplitudes of extratropical planetary waves in the stratosphere: tropospheric influence and equatorial Quasi-Biennial Oscillation (QBO) modulation. Our results show that the QBO modulation on wave amplitudes is statistically significant only for wavenumber-1 in early winter. The variability of wavenumber-2 amplitude is mainly determined by tropospheric forcing. The effect of the solar cycle on planetary-wave amplitude is also discussed.

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