Gravity Wave Heating and Cooling in Saturn's Thermosphere

Details Gravity Wave Heating and Cooling in Saturn's Thermosphere Gravity Wave Heating and Cooling in Saturn's Thermosphere

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa24a..06h&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SA24A-06

Physics

3384 Waves And Tides

Scientific paper

Recently published simulations obtained using a global circulation model demonstrate that the currently understood heat sources are unable to explain the observed temperature of Saturn's thermosphere. Those simulations provided the globally averaged altitude variation of the heat source required to reconcile observations with theory. Thus, the missing heat source, which was assumed to be due to dissipating gravity waves, was constrained by the modeling. Using this constraint and a full-wave model previously used to examine the propagation and dissipation of acoustic-gravity waves in the thermospheres of Earth and Jupiter, we simulate gravity wave propagation and dissipation in Saturn's thermosphere. A broad range of wave parameters (periods, horizontal wavelengths and energy fluxes) is considered. These simulations reveal those parts of the wave spectrum that are likely to be important to the temperature of Saturn's thermosphere.

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