Variations of mean winds and tides in the upper middle atmosphere over a solar cycle, Saskatoon, Canada, 52 deg N, 107 deg W

Details Variations of mean winds and tides in the upper middle atmosphere over a solar cycle, Saskatoon, Canada, 52 deg N, 107 deg W Variations of mean winds and tides in the upper middle atmosphere over a solar cycle, Saskatoon, Canada, 52 deg N, 107 deg W

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55.1325n&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 10, p. 1325-1334.

Physics

25

Middle Atmosphere, Radar Data, Solar Cycles, Upper Atmosphere, Wind Variations, Annual Variations, Radar Measurement, Tides

Scientific paper

The effects of solar activity on upper middle atmospheric winds and tidal amplitudes are investigated on the basis of Saskatoon MF radar data from 1979 to 1990. The period under consideration covers two solar maxima and a solar minimum; the continuous data allow a systematic analysis of solar cycle dependence on mean winds and tides. The height region of 79-97 km exhibits an apparent but very slight dependence of mean winds and tidal amplitudes on solar activity variation. The mean zonal wind and semidiurnal tidal amplitudes show positive and negative correlations with the solar activity, respectively. There is a biennial periodicity evident in the azonal wind oscillations, but this does not have a consistent phase relationship with the equatorial stratospheric wind oscillations.

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