Blowoff on an atmosphere and possible application to Io

Details Blowoff on an atmosphere and possible application to Io Blowoff on an atmosphere and possible application to Io

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..271h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 12, May 1985, p. 271-273.

Other

21

Atmospheric Diffusion, Io, Satellite Atmospheres, Aeronomy, Oxygen, Sulfur, Sulfur Dioxides, Toroidal Plasmas, Jupiter, Satellites, Io, Atmosphere, Diffusion, Drag, Flux, Gases, Escape, Oxygen, Sulfur, Sulfur Dioxide, Eddies, Ions, Bombardment, Exosphere, Ejection, Element Ratios

Scientific paper

Diffusion equations for two components are set up with mutual drag terms included. It is found that these terms become important when the flux of an escaping gas is of the order of its diffusion limit. In this situation, other gases can be dragged along (blowoff) and both scale heights tend towards equality. It appears that this may ocurr on Io, giving a strong tendency to equalize the scale heights of O, S, and SO2 without any appeal to eddy diffusion. Ionic bombardment of the exosphere may therefore eject material with an O:S ratio approaching 2, rather than the much higher value expected for a diffusively separated atmosphere. Future aeronomical studies of this atmosphere should include the drag terms in the diffusion equations.

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