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| Titel |
Detection of SO2 above the clouds of Venus using SPICAV/Venus Express |
| VerfasserIn |
E. Marcq, J. L. Bertaux, F. Montmessin |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021671
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| Zusammenfassung |
| 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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