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    An uppermost haze layer above 100 km found over Venus by the SOIR instrument onboard Venus Express

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    Authors
    Takagi, S.
    Mahieux, A.
    Wilquet, V.
    Robert, S.
    Vandaele, A.C.
    Iwagami, N.
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    Discipline
    Physical sciences
    Subject
    Venus
    Cloud
    Haze
    Atmosphere
    Spectroscopy
    Audience
    Scientific
    Date
    2019
    Metadata
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    Description
    The Solar Occultation in the InfraRed (SOIR) instrument onboard Venus Express was designed to measure the Venusian atmospheric transmission at high altitudes (65–220 km) in the infrared range (2.2–4.3 μm) with a high spectral resolution. In this work, we investigate the optical properties of Venus’s haze layer above 90 km using SOIR solar occultation observations. Vertical and latitudinal profiles of the extinction coefficient, optical thickness, and mixing ratio of aerosols are retrieved. One of the most remarkable results is that the aerosol mixing ratio tends to increase with altitude above 90 km at both high and low latitudes. We speculate how aerosols could be produced at such high altitudes.
    Citation
    Takagi, S.; Mahieux, A.; Wilquet, V.; Robert, S.; Vandaele, A.C.; Iwagami, N. (2019). An uppermost haze layer above 100 km found over Venus by the SOIR instrument onboard Venus Express. , Earth, Planets and Space, Vol. 71, A124, DOI: 10.1186/s40623-019-1103-x.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7407
    doi: http://dx.doi.org/10.1186/s40623-019-1103-x
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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