Space Science Reviews

, Volume 116, Issue 1, pp 211–224

Io’s Atmosphere and Surface-Atmosphere Interactions


DOI: 10.1007/s11214-005-1957-z

Cite this article as:
Lellouch, E. Space Sci Rev (2005) 116: 211. doi:10.1007/s11214-005-1957-z


Our knowledge of Io’s atmosphere has improved dramatically in the last fifteen years, with a wealth of new observational data at millimeter, UV and IR wavelengths, and the development of numerous models describing its horizontal and vertical structure, composition, photochemistry and plasma interaction. Io’s atmosphere is dominantly composed of SO2, present mostly at low-tomid latitudes with column densities of a few 1016 cm−2 and important (factors of 5-10) longitudinal variations. Minor compounds include SO, S2, and NaCl. Sublimation equilibrium with SO2 frost and direct volcanic output coexist to maintain Io’s atmosphere against condensation, photolytic and escape losses.


Ioatmospheresublimation equilibriumvolcanism

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.LESIA, Observatoire de ParisMeudon