Titan:  some new results.
New analyses of Voyager spectra of Titan have led to improvements in the determination of abundances of minor constituents as a function of latitude and altitude.  Ground-based microwave observations have extended the Voyager results for HCN, and have demonstrated that CO is mysteriously deficient in the stratosphere.  The origin of the CH4, CO, and N2 in Titan's atmosphere is still unresolved.  Both primordial and evolutionary sources are compatible with the available evidence.
Owen
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Department of Earth and Space Sciences, State University of New York, Stony Brook 11794.
Gautier
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D001272:Atmosphere; D002245:Carbon Dioxide / Q000138:chemical synthesis; D002248:Carbon Monoxide / Q000737:chemistry; D018559:Exobiology; D005118:Extraterrestrial Environment; D006838:Hydrocarbons / Q000737:chemistry; D008697:Methane / Q000737:chemistry; D018539:Saturn; D016082:Solar System; D013026:Space Flight
D006838:Hydrocarbons; D002245:Carbon Dioxide; D002248:Carbon Monoxide; D008697:Methane