The composition of Saturn's atmosphere

Details The composition of Saturn's atmosphere The composition of Saturn's atmosphere

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.241...13c&link_type=abstract

In ESA The Atmospheres of Saturn and Titan p 13-20 (SEE N86-28849 19-88)

Other

Atmospheric Chemistry, Atmospheric Composition, Saturn Atmosphere, Abundance, Photochemical Reactions, Planetary Evolution

Scientific paper

The abundance determinations for the gaseous constituents of Saturn's atmosphere are reviewed. They show that helium is significantly depleted in the outer atmosphere, an important finding for Saturn's interior and heat balance. Saturn's atmosphere is enriched in volatiles CH4, NH3, and PH3, although rather large uncertainties remain on the CH4 and NH3 mixing ratios. Except for PH3, little information is available on species considered to be diagnostic of disequilibrium processes (GeH4, HCN, CO). Determinations of C2H2 and C2H6 mixing ratios and of their variations with latitude/altitude yield constraints for the modeling of photochemical (or other) processes in the stratosphere. The deuterium abundance derived from CH3D lines is close to the value obtained for the protosolar nebula. Implications of Saturn's composition for the origin and evolution of the planet are outlined.

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