α-effect due to wave reflection from the core mantle boundary |
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| Authors: | A P Anufriev |
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| Institution: | Geophysical Institute , Bulgarian Academy of Sciences , Sofia , Bulgaria , 1113 |
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| Abstract: | Abstract Latitude behavior of the boundary α-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 α-effect which resemble those of Braginsky: concentration near the boundary, sign-changing of α in the layer and geometrical behavior. The last includes the vanishing of α near the poles and the equator which is characteristic for Braginsky's α-effect. It is also shown that for Magnetic Reynolds Number of order 100 the amplitude of the α-effect and the thickness of the α-layer is of the order of those used in model-Z. |
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| Keywords: | Dynamo theory model-Z hydromagnetic wave |
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