-effect due to wave reflection from the core mantle boundary

Physics – Fluid Dynamics

Scientific paper

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Dynamo Theory, Model-Z, Hydromagnetic Wave

Scientific paper

Latitude behavior of the boundary -effect based on reflection of hydromagnetic waves from the Core-Mantle Boundary (CMB) studied earlier by Anufriev (1991), is discussed. Its form given in Figure 2 is in good agreement with that used in model-Z of Braginsky. We want to emphasize the following main features of our -effect which resemble those of Braginsky: concentration near the boundary, sign-changing of in the layer and geometrical behavior. The last includes the vanishing of near the poles and the equator which is characteristic for Braginsky's -effect. It is also shown that for Magnetic Reynolds Number of order 100 the amplitude of the -effect and the thickness of the -layer is of the order of those used in model-Z.

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