Lightning in the clouds on Venus should most nearly resemble intra-cloud discharges on earth. Intra-cloud discharges are weaker, shorter and more frequent than cloud-to-ground discharges and cause more slowly varying luminosity. Terrestrial lightning also has both geographic and local time orderings. At Venus, there is much evidence for lightning similar to terrestrial lightning. The Venera landers saw electromagnetic radiation much like sferics from terrestrial lightning. Pioneer Venus also saw such signals leaking out into the night ionosphere. These signals have a strong local time dependence not unlike terrestrial lightning. The local time distribution helps explain the mixed results of optical surveys. The successful observation was on the evening side where there is much apparently lightning-generated electromagnetic radiation; the unsuccessful observations were on the morning side where such plasma waves, and hence lightning discharges, appear to be rare.


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    Title :

    Evidence for lightning on Venus


    Contributors:

    Published in:

    Publication date :

    1990-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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