Solar Rotation Effects on the Thermospheres of Mars and Earth

Details Solar Rotation Effects on the Thermospheres of Mars and Earth Solar Rotation Effects on the Thermospheres of Mars and Earth

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sci...312.1366f&link_type=abstract

Science, Volume 312, Issue 5778, pp. 1366-1368 (2006).

Computer Science

23

Scientific paper

The responses of Earth's and Mars' thermospheres to the quasi-periodic (27-day) variation of solar flux due to solar rotation were measured contemporaneously, revealing that this response is twice as large for Earth as for Mars. Per typical 20-unit change in 10.7-centimeter radio flux (used as a proxy for extreme ultraviolet flux) reaching each planet, we found temperature changes of 42.0 +/- 8.0 kelvin and 19.2 +/- 3.6 kelvin for Earth and Mars, respectively. Existing data for Venus indicate values of 3.6 +/- 0.6 kelvin. Our observational result constrains comparative planetary thermosphere simulations and may help resolve existing uncertainties in thermal balance processes, particularly CO2 cooling.

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