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| Titel |
Sulfur dioxide in the Venus atmosphere measured by SOIR on board Venus Express |
| VerfasserIn |
Arnaud Mahieux, Ann Carine Vandaele, Rachel Drummond, Séverine Robert, Valerie Wilquet, Denis Belyaev, Jean-Loup Bertaux |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094814
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| Publikation (Nr.) |
 EGU/EGU2014-10245.pdf |
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| Zusammenfassung |
| SO_2 is a key constituent of the Venus mesosphere, playing an important role in the
atmosphere chemistry, as it is a product of the photodisociation of the clouds constituent,
H2SO4. New SO2 observations are important in the frame of constraining Global
Computation Models (GCM), which simulate the circulation and the chemistry of
the Venus atmosphere. The SOIR instrument flying on board the Venus Express
spacecraft records infrared spectra of the Venus atmosphere, using the solar occultation
technique. Amongst the species absorbing in the SOIR wavelength range, sulfur dioxide
presents a weak band, from which regular observations are obtained in the 60 to 100
km altitude region. We derive number density and volume mixing ratio vertical
profiles. Total density and temperature profiles are obtained from the carbon dioxide
number density profiles. This study presents the latitude and temporal variations
observed between 2006 and 2013. The results are compared to literature data and
discussed. Future work will consist of including and comparing the data to Venus
GCM. |
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