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Model of Geodynamo driven by six-jet convection in the Earth's core

G. M. Vodinchar1, 2 , L. K. Feshchenko1

1 Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS, 7 Mirnaya str., Paratunka, Kamchatka region, Russia
2 Vitus Bering Kamchatka State University, 4 Pogranichnaya str., Petropavlovsk-Kamchatsky, Russia

Abstract
We describe a large-scale Geodynamo model based on indirect data of inhomogeneities in the density of the Earth's core. The convection pattern is associated with a spherical harmonic Y42 which defines the basic poloidal component of velocity. Coriolis drift of this mode determines the toroidal component of velocity. Thus, six convective cells are formed. The model takes into account the feedback effect of the magnetic field on convection. It was ascertained that the model contains stable regimes of field generation. The velocity of convection and the dipole component of the magnetic field are similar to the observed ones. Figs 6, Refs 28.

Magnetohydrodynamics 52, No. 1/2, 287-300, 2016 [PDF, 1.67 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X
DOI: http://doi.org/10.22364/mhd