Abstract
Based on zonal (Vox) and meridional (Voy) prevailing wind measurements from June 1982 to May 1986 at three stations: Irkutsk, Collm and Saskatoon, as well as the solar radio emission at 10.7 cm wavelength (F10.7) and the planetary index of geomagnetic activity (Ap), an analysis of their periodic structure is presented. The estimates of the relative contribution of the helio-geomagnetic activity quasiperiodic variation to prevailing wind fluctuations show that a key role in the formation of 27-day oscillations are played by variations of the solar radio emission index F10.7.
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