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

The mesospheric zonal and meridional winds over Saskatoon (52 degrees N, 10 7 degrees W) show significant QBO (quasi-biennial oscillations), with perio ds 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, 2.2 9, and 2.61 years in the zonal least) component, mostly not matching with t he QBO (similar to 2.50 years) of equatorial stratospheric winds. Also, sig nificant higher periodicities (similar to 4 years) are seen in the mesosphe ric 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 Nino-Southern Oscillation effects).