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Related Experiment Videos

Venus: dead or alive?

H A Taylor, P A Cloutier

    Science (New York, N.Y.)
    |November 28, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Pioneer Venus Orbiter electric field data do not support lightning on Venus. The observed signals likely originate from plasma instabilities, not atmospheric activity, suggesting Venus is not volcanically active.

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    Area of Science:

    • Planetary Science
    • Atmospheric Science
    • Plasma Physics

    Background:

    • In situ electric field observations from Pioneer Venus Orbiter were previously interpreted as evidence of lightning in Venus's lower atmosphere.
    • This interpretation suggested active volcanism due to lightning clustering over highland regions.

    Purpose of the Study:

    • To re-evaluate the interpretation of Pioneer Venus Orbiter electric field data.
    • To determine if the observed phenomena indicate lightning and active volcanism on Venus.

    Main Methods:

    • Analysis of the correlation between 100-hertz electric field events and nightside ionospheric ionization troughs.
    • Spatial distribution analysis of the electric field noise events.

    Main Results:

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    • Electric field events correlate with nightside ionization troughs, indicating they stem from plasma instabilities, not lower atmospheric lightning.
    • The spatial distribution of the noise is random, not clustered over highland topography.

    Conclusions:

    • The electric field observations do not support the presence of lightning on Venus.
    • There is no basis for inferring currently active volcanic output from this data.
    • Current evidence suggests Venus is no longer geologically active.