Stratospheric aerosols from CH4 photochemistry on Neptune

Details Stratospheric aerosols from CH4 photochemistry on Neptune Stratospheric aerosols from CH4 photochemistry on Neptune

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..941r&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 941-944.

Physics

29

Hydrocarbons, Methane, Neptune Atmosphere, Photochemical Reactions, Aerosols, Stratosphere, Voyager 2 Spacecraft, Neptune, Stratosphere, Aerosols, Methane, Photochemistry, Hypotheses, Condensation, Models, Hydrocarbons, Ice, Haze, Diacetylene, Production Rates, Ethane, Acetylene, Eddy Diffusion, Mixing, Temperature

Scientific paper

A combined photochemical-condensation model has been used to study hydrocarbon ices produced from CH4 photolysis in the stratosphere of Neptune. A total stratospheric haze production rate of 4.2 x 10 to the -15th g/sq cm/s. The total production rate is insensitive to within a factor of two to order of magnitude changes in the eddy diffusion coefficient and methane mixing ratio, which is within the present estimate of uncertainty for this number. The condensation temperatures are 97 K for C4H2, 71 K for C2H2, and 64 K for C2H6. Voyager 2 images of Neptune will be able to confirm the presence of stratospheric aerosols and provide constraints on their production rate and location.

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