Dynamo energetics and the structure of the outer core
- 1 December 1989
- journal article
- research article
- Published by Taylor & Francis in Geophysical & Astrophysical Fluid Dynamics
- Vol. 49 (1) , 213-219
- https://doi.org/10.1080/03091928908243473
Abstract
The development of a realistic model of the geomagnetic dynamo can be enhanced by parameterizing more accurately the fluid motions in the outer core which are driven by compositional buoyancy. It is argued that the bulk of the outer core may be weakly stably stratified, with convective plumes of compositionally buoyant material rising from the inner core boundary through a relatively quiescent outer core to the core-mantle boundary. The dynamo action of these isolated convective plumes may be more easily modeled than that of general outer-core convection.Keywords
This publication has 28 references indexed in Scilit:
- On the computation of steady, self - consistent spherical dynamosGeophysical & Astrophysical Fluid Dynamics, 1987
- Pressure freezing of the Earth's inner corePhysics of the Earth and Planetary Interiors, 1985
- Self-consistent dynamo models driven by hydromagnetic instabilitiesPhysics of the Earth and Planetary Interiors, 1984
- Penetrative convection in the upper ocean due to surface coolingGeophysical & Astrophysical Fluid Dynamics, 1982
- A theory of convection: Modelling by two buoyant interacting fluidsGeophysical & Astrophysical Fluid Dynamics, 1982
- Structure of the Earth's inner coreNature, 1981
- Magnetic waves in the core of the earth. IIGeophysical & Astrophysical Fluid Dynamics, 1979
- An estimate of inner core densityPhysics of the Earth and Planetary Interiors, 1972
- Turbulent buoyant convection from a source in a confined regionJournal of Fluid Mechanics, 1969
- Energetics of core formationJournal of Geophysical Research, 1965