Seasonal and latitudinal variations of the lower thermospheric tidal winds from meteor radar measurements in the U.S.S.R

Details Seasonal and latitudinal variations of the lower thermospheric tidal winds from meteor radar measurements in the U.S.S.R Seasonal and latitudinal variations of the lower thermospheric tidal winds from meteor radar measurements in the U.S.S.R

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54..915l&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, no. 7-8, July-Aug. 1992, p. 915-926.

Mathematics

Logic

4

Annual Variations, Atmospheric Tides, Latitude, Meteorological Radar, Radar Measurement, Thermosphere, Diurnal Variations, Wind Measurement

Scientific paper

Seasonal variations of diurnal and semidiurnal tidal oscillations in the lower thermosphere are reported based on meteor-radar wind measurements. The wind measurements were taken at altitudes of 93-95 km at sites in the former Soviet Union and Antarctica, and the data are averaged over the meteor zone. The amplitudes and phases of the semidiurnal tide are examined in detail revealing a 22-yr oscillation, and the results are compared with theoretical predictions. The amplitudes and phases of the semidiurnal wind oscillations in the lower thermosphere vary from day to day. A significant temporal variability is noted in the diurnal wind variations, but the theory of atmospheric tides can explain their mean characteristics. A pronounced seasonal variation is concluded to affect the mode composition of the semidiurnal tidal oscillations.

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