Thermospheric gravity waves near the source - Comparison of variations in neutral temperature and vertical velocity at Sondre Stromfjord

Details Thermospheric gravity waves near the source - Comparison of variations in neutral temperature and vertical velocity at Sondre Stromfjord Thermospheric gravity waves near the source - Comparison of variations in neutral temperature and vertical velocity at Sondre Stromfjord

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..939h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Sept. 1984, p. 939-942.

Physics

12

Atmospheric Heating, Gravity Waves, Neutral Atmospheres, Thermosphere, Wind Velocity, Atmospheric Temperature, Temperature Distribution, Temperature Effects, Transfer Functions, Vertical Distribution

Scientific paper

Theoretical predictions of thermospheric gravity wave oscillations are compared with observed neutral temperatures and velocities. The data were taken in February 1983 using a Fabry-Perot interferometer located on Greenland, close to impulse heat sources in the auroral oval. The phenomenon was modeled in terms of linearized equations of motion of the atmosphere on a slowly rotating sphere. Legendre polynomials were used as eigenfunctions and the transfer function amplitude surface was characterized by maxima in the wavenumber frequency plane. Good agreement for predicted and observed velocities and temperatures was attained in the 250-300 km altitude. The amplitude of the vertical velocity, however, was not accurately predicted, nor was the temperature variability. The vertical velocity did exhibit maxima and minima in response to corresponding temperature changes.

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