Journal
ICARUS
Volume 226, Issue 1, Pages 1177-1181Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.icarus.2013.06.032
Keywords
Io; Satellites, General; Atmospheres, Evolution; Volcanism
Categories
Funding
- NASA Planetary Astronomy Grant [NNX11AD61G]
- NASA [NNX11AD61G, 148821] Funding Source: Federal RePORTER
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New 19 mu m spectroscopy of Io's SO2 atmosphere in 2012 and 2013, when combined with our earlier observations starting in 2001, provides a near-yearly record of atmospheric density in the lowest scale height, spanning almost an entire jovian year. We find that the anti-Jupiter hemisphere atmospheric density is decreasing following Jupiter's 2011 perihelion passage, confirming our model (Tsang, C.C.C., Spencer, J.R., Lellouch, E., Lopez-Valverde, M.A., Richter, M.J., Greathouse, T.K., [2012]. Icarus 217, 277-296) that the anti-jovian atmosphere has a large sublimation-supported component that peaks near perihelion. (C) 2013 Elsevier Inc. All rights reserved.
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