Semiannual variations in the mesosphere

Details Semiannual variations in the mesosphere Semiannual variations in the mesosphere

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.3722g&link_type=abstract

Journal of Geophysical Research, vol. 80, Sept. 1, 1975, p. 3722-3724.

Physics

Annual Variations, Atmospheric Temperature, Ionospheric Disturbances, Mesosphere, Radio Attenuation, Atmospheric Ionization, Stratosphere, Thermosphere, Weather Stations

Scientific paper

Radio wave absorption data for a large number of stations have been used to study the semiannual variations (SAV's) in the mesosphere. Temperature data for 50-km levels have also been utilized for a similar study. While the temperature data show a systematic variation for all latitudes investigated, the absorption data do not yield a systematic phase relationship with latitude. However, the maximum SAV is found to occur at the high-latitude station. The different behavior of SAV's with latitude could perhaps be explained in terms of mesospheric composition changes resulting from a SAV in the circulation pattern of the lower atmosphere.

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