Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 368, Issue 1916, Pages 1595-1605Publisher
ROYAL SOC
DOI: 10.1098/rsta.2009.0250
Keywords
dynamo theory; oscillations; magnetic field reversals
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Funding
- Division Of Physics
- Direct For Mathematical & Physical Scien [923838] Funding Source: National Science Foundation
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We present a review of the different models that have been proposed to explain reversals of the magnetic field generated by a turbulent flow of an electrically conducting fluid (fluid dynamos). We then describe a simple mechanism that explains several features observed in palaeomagnetic records of the Earth's magnetic field, in numerical simulations and in a recent dynamo experiment. A similar model can also be used to understand reversals of large-scale flows that often develop on a turbulent background.
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