Modelling of the lower thermosphere - Contributions of incoherent scatter observations

Details Modelling of the lower thermosphere - Contributions of incoherent scatter observations Modelling of the lower thermosphere - Contributions of incoherent scatter observations

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jatp...44...95a&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 44, Feb. 1982, p. 95-109.

Computer Science

Sound

6

Atmospheric Models, Atmospheric Tides, Gravity Waves, Incoherent Scatter Radar, Ionospheric Sounding, Periodic Variations, Signal Analysis, Thermosphere, Atmospheric Temperature, Diffusion Coefficient, Nitrogen, Oxygen, Solar Activity, Turbulent Diffusion, Vertical Distribution

Scientific paper

Important contributions of incoherent scattering soundings to the description, understanding and modeling of the lower thermosphere structure and variations are described. Contributions include progress in the description and modeling of the characteristics of propagating and in situ generated tides in the lower thermosphere, and estimates of the amount of energy dissipated by gravity waves. Observations of vertical distribution and the long-term variations of temperature and concentration of molecular nitrogen indicate that the molecular oxygen may be in diffusive equilibrium between 120 and 200 km under lower solar activity conditions. In addition, theoretical computations of the eddy diffusion coefficient from the modeled temperature and density profiles in the lower thermosphere reveal a large seasonal variation of the parameter around a mean value of a few million sq cm per s.

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