Quasi-biennial and higher-period oscillations in the mean winds in the mesosphere and lower thermosphere over Saskatoon, 52°N, 107°W

Details Quasi-biennial and higher-period oscillations in the mean winds in the mesosphere and lower thermosphere over Saskatoon, 52°N, 107°W Quasi-biennial and higher-period oscillations in the mean winds in the mesosphere and lower thermosphere over Saskatoon, 52°N, 107°W

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...104.2645k&link_type=abstract

Journal of Geophysical Research, Volume 104, Issue A2, p. 2645-2652

Physics

3

Meteorology And Atmospheric Dynamics: Mesospheric Dynamics, Atmospheric Composition And Structure

Scientific paper

The mesospheric zonal and meridional winds over Saskatoon (52°N, 107°W) show significant QBO (quasi-biennial oscillations), with periods of 2.01, 2.42, 2.30, 2.37, and 2.31 years at 94, 91, 88, 85, and 82 km, respectively, in the meridional (north) component and 2.51, 2.88, 2.52, 2.29, and 2.61 years in the zonal (east) component, mostly not matching with the QBO (~2.50 years) of equatorial stratospheric winds. Also, significant higher periodicities (~4 years) are seen in the mesospheric winds, indicating that QBO and higher periodicities in the midlatitude mesosphere could be highly distorted forms of stratospheric wind QBO and/or may have altogether different origins (e.g., El Ninño-Southern Oscillation effects).

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