Solar rotation effects on the thermospheres of Mars and Earth


Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Forbes, JM; Bruinsma, S; Lemoine, FG

Published Date

  • June 2, 2006

Published In

Volume / Issue

  • 312 / 5778

Start / End Page

  • 1366 - 1368

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1126389

Citation Source

  • Scopus