Detection of SO2 above the clouds of Venus using SPICAV/Venus Express

Details Detection of SO2 above the clouds of Venus using SPICAV/Venus Express Detection of SO2 above the clouds of Venus using SPICAV/Venus Express

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eguga..11.3111m&link_type=abstract

"EGU General Assembly 2009, held 19-24 April, 2009 in Vienna, Austria http://meetings.copernicus.org/egu2009, p.3111"

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Sulphur dioxide (SO2) is an important trace species in the atmosphere of Venus, especially since it may be related to a possible geological activity on the surface within the last 106 to 107 years. We used spectra from the UV spectrometer SPICAV (R ~ 200) aboard the space probe Venus Express in nadir mode: the sunlight diffused and reflected by the top of the atmosphere was analysed in a search for SO2 spectral bands. The comparison between radiative transfer models (Monte-Carlo and SHDOM) and actual spectra confirms unambiguously the presence of SO2, and we are able to measure both SO2 column abundance and scale height. Horizontal variability will also be discussed, as well as possible variations with the local time (solar zenith angle).

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