Non-linear effects on tidal and planetary waves in the lower thermosphere - Preliminary results

Details Non-linear effects on tidal and planetary waves in the lower thermosphere - Preliminary results Non-linear effects on tidal and planetary waves in the lower thermosphere - Preliminary results

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12...77g&link_type=abstract

(The earth's middle and upper atmosphere; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission C /M

Physics

Atmospheric Tides, Planetary Waves, Thermosphere, Tidal Waves, Wind Velocity, Fast Fourier Transformations, Fourier Transformation, Wind (Meteorology), Zonal Flow (Meteorology)

Scientific paper

The analysis of the amplitude variations of the semidiurnal tide for series of wind data collected in the lower thermosphere throughtout more than ten years (1979-1990) at the CNR radar station near Bologna (I), reveals the presence of periodicities with time scales quite similar to those of planetary waves, as deduced from the correspondent wind velocity spectra mainly in the 2-10 day band at 90-100 km. Possible nonlinear coupling processes between tidal and planetary waves would account for the presence of subsidiary peaks close to the semidiurnal period mainly in the 10-16h band.

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