Computer Science
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12...11a&link_type=abstract
(Planetary studies; Proceedings of Symposium 4 and the Topical Meeting of the Interdisciplinary Scientific Commission B /Meeting
Computer Science
2
Atmospheric Composition, Hydrocarbons, Neptune Atmosphere, Turbulent Diffusion, Atmospheric Chemistry, Atmospheric Temperature, Diffusion Coefficient, Methane, Photochemical Reactions
Scientific paper
The most recent analysis of the Voyager ultraviolet solar occultation observations at Neptune indicates a methane mixing ratio 1-10 times above saturation in the lower stratosphere, unlike the value of 500-1000 times saturation which was suggested just before the encounter of Voyager with Neptune. The acetylene mixing ratio in the 0.1 mb region is found to be (6-8) x 10 exp -8, which is approximately a factor of 3 lower than the value reported in our Voyager/Science paper. The eddy diffusion coefficient at the homopause (1-3) x 10 exp 7 sq cm/s, is found to be more like that of Saturn than Uranus. The new results on CH4, C2H2 and K have strong implications for the stratospheric temperatures, now warmer, and the source of heating. Furthermore, the pre-Voyager models of the hydrocarbon hazes need to be revised in view of the new model atmosphere.
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