Hydrocarbon nucleation and aerosol formation in Neptune's atmosphere

Details Hydrocarbon nucleation and aerosol formation in Neptune's atmosphere Hydrocarbon nucleation and aerosol formation in Neptune's atmosphere

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar...99..318m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 99, no. 2, p. 318-346.

Physics

46

Aerosols, Atmospheric Composition, Hydrocarbons, Neptune Atmosphere, Nucleation, Haze, Photodissociation, Planetary Meteorology, Stratosphere

Scientific paper

The present theoretical analysis of particle formation mechanisms at conditions relevant to the troposphere and stratosphere of Neptune indicates that the hydrocarbon-nucleation process in the lower stratosphere is very inefficient, because saturation ratios much greater than unity are required in the cases of aerosol formation by homogeneous, heterogeneous, and ion-induced nucleation. The latter two of these, however, should be possible on Neptune for most of the complex hydrocarbon species in question. The relative effectiveness of heterogeneous and ion-induced nucleation depends on the physical and thermodynamic properties of the species in question, condensable-species abundance, supersaturation temperatures, and the number and type of available condensation ions or nuclei.

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