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    "Evidence of azimuthal anisotropy for the thermal infrared radiation leaving the Earth's atmosphere"

    Authors
    Clerbaux, N.
    Ipe, A.
    Bertrand, C.
    Dewitte, S.
    Nicula, B.
    Gonzalez, L.
    Show allShow less
    Discipline
    Earth and related Environmental sciences
    Subject
    azimuthal anisotropy
    thermal
    radiation
    earth's atmosphere
    CERES
    Audience
    General Public
    Scientific
    Date
    2003
    Publisher
    IRM
    KMI
    RMI
    Metadata
    Show full item record
    Description
    The analysis of one year of Cloud and the Earth’s Radiant Energy System (CERES) data from the Earth Observation System (EOS)-Terra satellite provides evidence that the longwave radiation escaping from the atmosphere exhibits significant variability according to the azimuthal angle of observation. A regional analysis of this variability shows that the anisotropy in azimuth is maximum over mountain and desert areas and under cloud-free conditions. A relative difference between north and south views of about 5% in annual average is observed over the Himalayan region in the 8–14 mm infrared (IR) window. The remote sensing community should be aware of this variability, in particular when analysing IR data provided by instruments on geostationary orbits. Indeed, in this case, the azimuthal anisotropy may lead to systematic overestimation of the outgoing longwave radiation and to biases on estimated quantities such as the surface temperature.
    Citation
    Clerbaux, N.; Ipe, A.; Bertrand, C.; Dewitte, S.; Nicula, B.; Gonzalez, L. (2003). "Evidence of azimuthal anisotropy for the thermal infrared radiation leaving the Earth's atmosphere". , Issue International Journal of Remote Sensing, Vol 24, pp. 3005-3010, IRM,
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/8808
    Type
    Article
    Peer-Review
    Not pertinent
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

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