Physics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...60..317w&link_type=abstract
Icarus (ISSN 0019-1035), vol. 60, Nov. 1984, p. 317-326.
Physics
36
Atmospheric Models, Planetary Ionospheres, Plasma Dynamics, Two Dimensional Models, Venus Atmosphere, Chemical Reactions, Equations Of Motion, Ion Recombination, Ionospheric Ion Density, Magnetohydrodynamic Flow, Photoionization
Scientific paper
A two-dimensional model of the ionosphere of Venus which simulates ionospheric dynamics by self-consistently solving the plasma equations of motion, including the inertial term, in finite difference form has been constructed. The model, which is applied over the solar zenith angle range extending from 60 to 140 deg and the altitude range 100 to 480 km, simulates the measured horizontal velocity field quite satisfactorily. The ion density field is somewhat overestimated on the dayside, because of the choice model neutral atmosphere, and underestimated on the nightside, because of setting the ionopause height at too low an altitude. It is concluded that solar photoionization on the dayside and ion recombination on the nightside are the processes mainly responsible for accelerating the plasma to the observed velocities. The plasma flow appears to be sufficient to maintain the nightside ionosphere at or near the observed median level of ion densities.
Brynsvold R. R.
Eich C. J.
Knudsen William C.
McCormick P. T.
Merritt David
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