Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.1110b&link_type=abstract
American Astronomical Society, DPS meeting #42, #11.10; Bulletin of the American Astronomical Society, Vol. 42, p.1019
Astronomy and Astrophysics
Astronomy
Scientific paper
A variety of heating mechanisms have been proposed to explain the high temperatures in Jupiter's upper atmosphere. Gravity waves transport energy and momentum to the upper atmosphere that can significantly alter the temperature and wind structure at these altitudes. Currently there is little information about the spectrum of the present gravity waves, their amplitudes, frequency of occurrence, and direction of propagation. Without observational constraints the effect of waves on the upper atmosphere cannot be correctly assessed. We propose to use variations in the H3+ emission in Jupiter's ionosphere as a measure of wave activity. We have constructed a two dimensional model of the Jovian ionosphere in which we use a gravity wave model to propagate waves and a radiative transfer model to examine the potentially observable parameters the waves. We find that the gravity waves strongly affect the lower ionosphere and can induce observable variations in the H3+ emission. We explore the wave parameter space to study the magnitude of the effect for different directions of wave propagation, magnetic field orientation, and location on the planet.
Barrow Daniel
Drossart Pierre
Matcheva Katia
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