Computer Science – Numerical Analysis
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..281m&link_type=abstract
Planetary and Space Science, vol. 26, Mar. 1978, p. 281-288.
Computer Science
Numerical Analysis
Earth Ionosphere, Magnetohydrodynamic Flow, Proton Flux Density, Sunset, Time Dependence, Atmospheric Composition, F 2 Region, Nocturnal Variations, Numerical Analysis, Pressure Gradients, Subsonic Flow
Scientific paper
The effect of the onset of postsunset conditions on thermal proton flow is examined for midlatitudes by numerical solution of the equations of continuity, momentum, and energy balance for H(+) and O(+). Results are calculated for a dipole magnetic field tube situated at L = 4, and acceleration terms are included in the momentum equations. Proton flow into the ionosphere results from decay of the F2-layer. Changes in temperatures and temperature gradients following sunset may not enhance the H(+) flow. Under extreme conditions the H(+) flow remains subsonic. It seems unlikely that an interhemispheric flux of protons can directly maintain the nighttime F2-layer.
Moffett R. J.
Murphy John Anthony
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