A Comparative Planetary Study: Exosphere Temperature Responses of Earth and Mars to Long-Term Solar Change

Details A Comparative Planetary Study: Exosphere Temperature Responses of Earth and Mars to Long-Term Solar Change A Comparative Planetary Study: Exosphere Temperature Responses of Earth and Mars to Long-Term Solar Change

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa24a..03f&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA24A-03

Other

0328 Exosphere, 0343 Planetary Atmospheres (5210, 5405, 5704), 0358 Thermosphere: Energy Deposition (3369), 3369 Thermospheric Dynamics (0358)

Scientific paper

Using densities derived from precise orbit determination of the Mars Global Surveyor (MGS) spacecraft from 1999 to mid-2005, the response of Mars' exosphere to long-term solar change is established and compared to that of Earth. At Mars, exosphere temperatures change only 36-50 percent as much as those at Earth as solar activity increases from solar minimum to solar maximum. General circulation models suggest that this difference may be strongly influenced by adiabatic cooling associated with the thermosphere general circulations. However, other processes such as differences in CO2 cooling rates may also be playing a role.

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