Gravity waves in the lower thermosphere

Details Gravity waves in the lower thermosphere Gravity waves in the lower thermosphere

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38..143m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 38, Feb. 1976, p. 143-148. Research supported by the National Research Cou

Computer Science

Sound

2

Amplitude Distribution Analysis, Gravity Waves, Ionospheric Sounding, Thermosphere, Wind Profiles, Covariance, E Region, Energy Dissipation, Phase Velocity, Tides, Turbulent Diffusion

Scientific paper

Sequential wind profiles (12/hr) for a 3-hr period were obtained by the D1 method, using partial reflections, for heights from approximately 80 km to the E-region. Changes in the hourly mean wind are discussed in terms of tidal and internal gravity (I.G.) waves (wave period between 20 and 120 min). Irregular components of the wind (I.G. wave amplitudes) are derived by differencing sequential profiles from the hourly mean. The amplitudes, covariances, vertical and horizontal wavelengths of the waves (wave period about 60 min) are obtained. Using data from 1974, the effects of dissipation of I.G. waves are considered. This leads to calculations of momentum deposition into the background flow, heating and eddy diffusion coefficients.

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