Other
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..373b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 16, May 1989, p. 373-376.
Other
30
Atmospheric Temperature, Mars Atmosphere, Solar Planetary Interactions, Upper Atmosphere, Electron Density Profiles, Gas Temperature, Neutral Gases, Plasma Density, Solar Cycles, Mars, Atmosphere, Temperature, Solar Effects, Spacecraft Observations, Comparisons, Parameters, Plasma, Altitudes, Flux, Solar Radiation, Gases, Ionosphere
Scientific paper
Neutral gas temperatures inferred from topside plasma scale heights of electron density distributions obtained from observations by the U.S. and USSR Mars missions imply a much higher dependence on solar activity than that found for Venus. This dependence, however, does not appear to be consistent with the observed solar cycle dependence of ionospheric peak plasma densities. The reason for this discrepancy seems to lie in the fact that photochemical equilibrium applies only to altitudes below 170 km, whereas topside scale heights are usually derived for a much greater altitude range and thus may be modified by transport and other processes. The response of the upper atmosphere of Mars, at least near the ionospheric peak, appears to be virtually identical to that of Venus.
Bauer Siegfried J.
Hantsch M. H.
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