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Dynamo Processes and Magnetic Field of the Earth and Planets

Kono, Masaru and Stevenson, David J. (2003) Dynamo Processes and Magnetic Field of the Earth and Planets. Jishin, 56 . pp. 311-325. ISSN 0037-1114.

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Three-dimensional fully nonlinear dynamo models were first presented in 1995 by two groups in Japan and USA. Since then, about ten groups have reported similar simulation results, and some important properties of the dynamos became known from these studies. Also in recent years, new observational results accumulated for the magnetic fields of planets (including satellites), and indicate very diverse dynamo and induction effects in these bodies. In this review, we first go through the method employed for the geodynamo simulations, and show how the magnetic field is generated and maintained by the convection system in the rotating spheres and spherical shells through a process similar to α-effect studied by kinematic models. We then review the observation of the planetary magnetic fields in the solar system, and investigate the conditions required for maintaining the dynamo process. Using these results, we examine the magnetic fields of the individual planets and consider how these fields are produced; by dynamo, induction, or remanent field.

Item Type:Article
Stevenson, David J.0000-0001-9432-7159
Additional Information:© 2003 Jishin Gakkai. Received June 12, 2003; Accepted October 10, 2003.
Record Number:CaltechAUTHORS:20131125-142833342
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42696
Deposited By: Tony Diaz
Deposited On:03 Dec 2013 23:40
Last Modified:03 Oct 2019 06:00

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