Venus thermospheric response to short-term solar variations

Details Venus thermospheric response to short-term solar variations Venus thermospheric response to short-term solar variations

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12..111k&link_type=abstract

(Recent results on Mars and Venus; Proceedings of Symposium 3 and the Topical Meetings of the Interdisciplinary Scientific Commi

Physics

Carbon Dioxide, Oxygen Atoms, Solar Planetary Interactions, Thermosphere, Twenty-Seven Day Variation, Venus Atmosphere, Atmospheric Temperature, Cooling, Pioneer Venus Spacecraft, Solar Activity Effects, Upper Atmosphere

Scientific paper

The mechanism responsible for cooling the dayside thermosphere of Venus from about 700 K to 300 K (Noll and McElroy, 1972) is examined by analyzing in situ measurements made by the Pioneer Venus Orbiter of the weak response of the thermosphere to short-term solar variations related to 27-day solar rotation. It is shown that, in order to cool the Venus dayside thermosphere to observed levels and to simultaneously explain the weak 27-day variations in the atmosphere, it is necessary to invoke strong CO2 cooling which is controlled principally by collisions of CO2 with atomic oxygen.

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