Sulfur Dioxide variability in the Venus atmosphere

Abstract : SO2 is strongly related to the formation of the clouds and haze on Venus, which are composed of sulfuric acid combined to water complexes. Presence and variations of SO2 could be the proof of a possible volcanism on Venus. The most intriguing are discrepancies among different observations, and the suspected long-term variations of the SO2 abundance observed on the scales of several years, in particular during Pioneer Venus Orbiter and Venus Express missions. Similar trends are also observed in the super-rotation period and circulation patterns, which suggest that these aspects may be more strongly coupled than expected. An ISSI international team has been built in view of considering different aspects of sulfur chemistry on Venus. This includes comparison and validation of observations, from past missions, from Venus Express, from the Earth, and from Hubble Space Telescope, modeling of photochemistry and of other processes in which the sulfur family is involved. We will consider not only SO2, but also SO and other constituents involved in its cycle. Reference density and vmr fields will be constructed from the detailed analysis and comparison of data. These will be included into the next generation of the VIRA references atmosphere.
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Contributor : Catherine Cardon <>
Submitted on : Monday, December 5, 2016 - 3:03:50 PM
Last modification on : Wednesday, August 7, 2019 - 2:34:15 PM

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  • HAL Id : insu-01408921, version 1

Citation

Ann Carine Vandaele, Arnaud Mahieux, Valérie Wilquet, Sarah Chamberlain, Oleg Korablev, et al.. Sulfur Dioxide variability in the Venus atmosphere. 26th IUGG, General Assembly 2015, Jun 2015, Prague, France. ⟨insu-01408921⟩

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