Journal ArticleDOI
Recent developments in the dynamo theory of planetary magnetism
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In this article, physically more realistic models of fluid motions in the liquid core have been introduced into the dynamo problem and attempts are being made to model particular episodes, such as reversals in the evolution in time of the geodynamo.Abstract:
of the geomagnetic field in terms of fluid motions in the outermost cor e has been revived and new methods of data analysis have been applied to this problem. Second, physically more realistic models of fluid motions in the liquid core have been introduced into the dynamo problem and attempts are being made to model particular episodes, such as reversals in the evolution in time of the geodynamo. Another fac tor that has stimulated interest in dynamo theory is the discovery and measurement of the magnetic fields of other planets. Jupiter, Saturn, and Mercury exhibit magnetic fields that appear to be caused by a dynamo process in the electrically conducting liquid cores of those planets. Because of the close similarity of the relevant physicalread more
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Journal ArticleDOI
On the theory of the geodynamo
TL;DR: In this paper, the authors trace the development of geodynamo theory leading from Larmor's original hypothesis (Larmor, 1919, Rep. Not. Assoc. Phys., 4: 372-447) to the proofs by Backus and Herzenberg (1958, Philos. Trans. R. Soc. A, 250: 543-585) that three-dimensional dynamo action is possible.
Journal ArticleDOI
Convection-driven geodynamo models
TL;DR: In this paper, the authors present numerical geodynamo models with thermal or compositional convection as the driving mechanism, which can give reasonable results for the morphology and strength of the field at the core-mantle boundary, and can also give reversals and excursions which can be compared with palaeomagnetic observations.
Book ChapterDOI
The Geomagnetic Field Its Nature, History, and Biological Relevance
TL;DR: In the past decade, it has become apparent that the importance of magnetic interactions is not confined to the world of physics but extends into the realm of physiology and whole organism biology as discussed by the authors.
Journal ArticleDOI
Homogeneous Dynamos in Planetary Cores and in the Laboratory
TL;DR: In the field of dynamo theory, a number of developments have occurred in recent years in this article, such as the increase in computer capacity has permitted simulations of convection-driven dynamos in rotating spherical fluid shells in parameter ranges much closer to those of the Earth's core than has been possible before.
References
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Journal ArticleDOI
On the nature of turbulence
David Ruelle,Floris Takens +1 more
TL;DR: A mechanism for the generation of turbulence and related phenomena in dissipative systems is proposed in this article, where the authors propose a mechanism for generating turbulence in a dissipative system with respect to dissipative energy.
Journal ArticleDOI
Cosmical magnetic fields
TL;DR: Magnetic Field Generation in Electrically-Conducting Fluids by H. K. Moffatt as mentioned in this paper is a seminal work in the field of magnetic field generation in electrically conducting fluids.