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    Two-scale model of a geomagnetic field variation (1993)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The effect of the vertical scale is investigated by considering a simple kinematic two-scale model of fluid flow inducing a variable magnetic field. Depending on the time constant, the induced magnetic field displays a variety of behaviors and geometries. In the high-frequency case, for example, a strong magnetic field tangential to the core mantle boundary, and hidden in the Delta layer, can be generated. A detailed computation and description of this magnetic field are presented. Some possible features of the secular variation of the actual geomagnetic field are discussed in the light of the model proposed here.
    Keywords: GEOPHYSICS
    Type: Geophysical Journal International (ISSN 0956-540X); 112; 1; p. 147-158.
    Format: text
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