Magnetic torque and convection in the earth's core |
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| Authors: | Gustáv Siráň Reviewer I Cupal |
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| Institution: | (1) Faculty of Sciences, The J. A. Comenius University, Bratislava |
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| Abstract: | Summary The problem of expressing analytically the magnetic torque, acting on the electrically conducting part of the Earth's mantle, is treated as a function of the system of convection on the surface of the core. The changes of velocities in the system of convection are estimated for decadic changes of the Earth's rotation and for the perturbation of the Earth's rotation in 1897. As regards the decadic changes of the Earth's rotation a change of velocity in the system of convection at the surface of the core of the order of 10–4 m/s corresponds, and as regards the perturbation of the Earth's rotation in 1897 (10–3 s/year) a change of velocity of 10–3 m/s reduced to the whole surface of the core corresponds, and 10–2 m/s corresponds for the region of the focus of the world geomagnetic anomaly (dimension of this region is 106 m). |
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