Coupling of pressure waves to clouds in the Jovian atmosphere

Details Coupling of pressure waves to clouds in the Jovian atmosphere Coupling of pressure waves to clouds in the Jovian atmosphere

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf...79g&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Computer Science

Sound

Scientific paper

The receipt for a successful study of the Jovian interior structure is given by the association of seismology and precise visible photometry. In this framework, the micro-satellite project Jovis, presented to the French space agency (Mosser et al, these proceedings), is for Jupiter a copy of what the European space mission COROT is for the stars. The Jovian visible flux being dominated by the albedo map, an accurate analysis of the cloud response to a seismic wave is needed. Therefore, we have revisited the propagation of sound waves in the Jovian troposphere, in order to estimate how they affect the clouds layer. We suppose a vertical wave propagating in a plane parallel atmosphere including an ammonia ice cloud layer. First, considering Jupiter as a mirror, we establish the variations of the reflected solar flux due to the smooth distorsions. Second, introducing thermodynamics, we determine the phase transitions induced by the waves in the clouds. These phase changes are linked to the ice particles growth, and limited by kinetics. A Mie model associated to a simple radiation transfer model allows us to estimate the final albedo fluctuations of the cloud perturbed by a seismic wave. We are then able to quantify the albedo response to a pressure wave.

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