Coupling of the core dynamo and mantle: Thermal or topographic?
- 7 December 1986
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 13 (13) , 1521-1524
- https://doi.org/10.1029/gl013i013p01521
Abstract
Static features in the earth's magnetic field and fixed sources of secular variation suggest the dynamo is anchored to the lowermost mantle via either thermal or topographic coupling. Here we show a correspondence with dynamic core topography, which is related to mantle temperature, and suggest further effects due to topography associated with subducting slabs. The two coupling mechanisms may occur on different time scales, providing a potential means for discriminating between them.This publication has 18 references indexed in Scilit:
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