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    Hydromagnetic waves in a buoyant medium (1976)

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    Type of Content
    Theses / Dissertations
    UC Permalink
    http://hdl.handle.net/10092/9071
    http://dx.doi.org/10.26021/5806
    Thesis Discipline
    Physics
    Degree Name
    Doctor of Philosophy
    Publisher
    University of Canterbury. Physics
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    • Science: Theses and Dissertations [3780]
    Authors
    Cummack, C. H.show all
    Abstract

    Lighthill has suggested that magnetic fields can transform gravity waves into Alfvén waves. The behaviour of gravity waves in an incompressible and infinitely conducting atmosphere is examined so as to check this suggestion. It is found that an upgoing gravity wave is converted to a downgoing Alfvén wave and that this conversion is affected without any introduced atmospheric discontinuity. In the ionosphere dissipation is sufficient, save at very long wavelengths, to inhibit mode conversion but in the solar atmosphere the process may well operate. The energy necessary to heat the solar corona could possibly be supplied by gravity waves when dissipation occurs after the conversion to an Alfvén wave.

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    Copyright C. H. Cummack
    https://canterbury.libguides.com/rights/theses
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