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    Venus mesospheric sulfur dioxide measurement retrieved from SOIR on board Venus Express

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    Mahieux(2015d).pdf (5.871Mb)
    Authors
    Mahieux, A.
    Vandaele, A.C.
    Robert, S.
    Wilquet, V.
    Drummond, R.
    Chamberlain, S.
    Belyaev, D.
    Bertaux, J.L.
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    Discipline
    Physical sciences
    Audience
    Scientific
    Date
    2015
    Metadata
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    Description
    SOIR on board Venus Express sounds the Venus upper atmosphere using the solar occultation technique. It detects the signature from many Venus atmosphere species, including those of SO2 and CO2. SO2 has a weak absorption structure at 4 µm, from which number density profiles are regularly inferred. SO2 volume mixing ratios (VMR) are calculated from the total number density that are also derived from the SOIR measurements. This work is an update of the previous work by Belyaev et al. (2012), considering the SO2 profiles on a broader altitude range, from 65 to 85 km. Positive detection VMR profiles are presented. In 68% of the occultation spectral datasets, SO2 is detected. The SO2 VMR profiles show a large variability up to two orders of magnitude, on a short term time scales. We present mean VMR profiles for various bins of latitudes, and study the latitudinal variations; the mean latitude variations are much smaller than the short term temporal variations. A permanent minimum showing a weak latitudinal structure is observed. Long term temporal trends are also considered and discussed. The trend observed by Marcq et al. (2013) is not observed in this dataset. Our results are compared to literature data and generally show a good agreement.
    Citation
    Mahieux, A.; Vandaele, A.C.; Robert, S.; Wilquet, V.; Drummond, R.; Chamberlain, S.; Belyaev, D.; Bertaux, J.L. (2015). Venus mesospheric sulfur dioxide measurement retrieved from SOIR on board Venus Express. , Planetary and Space Science, Vol. 113-114, 193-204, DOI: 10.1016/j.pss.2014.12.011.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2767
    doi: http://dx.doi.org/10.1016/j.pss.2014.12.011
    scopus: 2-s2.0-84935417377
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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