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News and Views
Nature 429, 137 (13 May 2004) | doi:10.1038/429137a
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Research Fellows in Pluripotent Stem Cell Technology
- The University of Nottingham
- Nottingham, UK
Post-Doctoral Position BAT IIa
- Justus-Liebig-University Giessen
- Giessen 35390 Germany
Geophysics: A fuel-efficient geodynamo?
Richard Holme1
Abstract
The hunt has been on for a source of extra power to account for the dynamo that generates the Earth's magnetic field. A synthesis of computation and experiment now suggests that the search may not be necessary after all.
The Earth's magnetic field originates in the core, a fluid region almost 3,000 km below our feet of which the main constituent is molten iron. The basic mechanism of field generation is generally accepted — it is a dynamo process, in which the magnetic field is maintained by convection of the highly electrically conducting fluid.
- Richard Holme is in the Department of Earth and Ocean Sciences, University of Liverpool, 4 Brownlow Street, Liverpool L69 3GP, UK.
e-mail: Email: holme@liv.ac.uk
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