Computer Science – Numerical Analysis
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jatp...36.2055s&link_type=abstract
(International Association of Geomagnetism and Aeronomy, Symposium on Dynamics, Chemistry and Thermal Processes in the Ionospher
Computer Science
Numerical Analysis
2
Annual Variations, Atmospheric Composition, Diffusion Coefficient, Magnetic Storms, Thermosphere, Turbulent Mixing, Abundance, Atmospheric Circulation, Atmospheric Models, Atmospheric Turbulence, Numerical Analysis, Turbulent Diffusion, Vertical Distribution
Scientific paper
The possibility of explaining the seasonal and magnetic storm related changes in the thermosphere and the ionosphere through variation in eddy diffusion coefficient in the lower thermosphere is investigated theoretically by obtaining simultaneous numerical solutions of the relevant continuity, momentum, and energy balance equations in a self-consistent manner. It is shown that various important features of thermospheric seasonal behavior, including the winter helium bulge phenomenon, can be explained by assuming effective reduction in the winter-time eddy diffusion coefficient by about one order of magnitude. Storm related changes in the thermal structure and composition are seen to arise by assuming a downward shift of turbulence. Physical implications and relative significance of variation in thermospheric turbulence and large scale inter-hemispheric circulation are briefly discussed.
Chandra Sharat
Krishna Sinha A.
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