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Geophysical & Astrophysical Fluid Dynamics, 1987
Abstract This paper describes a re-investigation of the geomagnetic dynamo model proposed by Braginsky (1978). This axisymmetric nonlinear model was dominated by Lorentz and Coriolis forces, and was maintained by a specified thermal wind and by a specifiedα-effect.
S. I. Braginsky, Paul H. Roberts
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Abstract This paper describes a re-investigation of the geomagnetic dynamo model proposed by Braginsky (1978). This axisymmetric nonlinear model was dominated by Lorentz and Coriolis forces, and was maintained by a specified thermal wind and by a specifiedα-effect.
S. I. Braginsky, Paul H. Roberts
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An iterative scheme for a geodynamo system
International Journal of Computer Mathematics, 2006In this paper we propose an iterative scheme for a nonlinear spherical geodynamo model and carry out convergence analysis of this scheme. Our model is a coupled system of fluid velocity u , total kinematic pressure P and magnetic field B . They are governed by the Navier–Stokes equations and the dynamo equations. Using the mathematical induction method
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Geodynamo theory and simulations
Reviews of Modern Physics, 200080 years ago, Joseph Larmor planted the seed that grew into today's imposing body of knowledge about how the Earth's magnetic field is created. His simple idea, that the geomagnetic field is the result of dynamo action in the Earth's electrically conducting, fluid core, encountered many difficulties, but these have by now been largely overcome, while ...
Paul H. Roberts, Gary A. Glatzmaier
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Energetic scaling of the geodynamo
Geomagnetism and Aeronomy, 2013The typical scales, velocities, and magnetic fields in the liquid core of the Earth are determined by using the analysis results of the magnitude of energy that is available for the geodynamo, physical regularities, and observational data. In this work, it is justified that the geomagnetic field is mainly generated in a regime where the magnetic ...
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Dynamics of the core, geodynamo
Reviews of Geophysics, 1995“The mechanism for generating the geomagnetic field remains one of the central unsolved problems in geoscience.” So states the report on the National Geomagnetic Initiative (NGI) prepared by the U.S. Geodynamics Committee, et al [1993], with advice from the NGI Workshop held in Washington D.C. in March 1992.
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The geodynamo’s unique longevity
Physics Today, 2013New insights into how Earth’s magnetic field has been sustained for billions of years closely link the planet’s core and mantle in the dynamo process.
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Geophysical & Astrophysical Fluid Dynamics, 1988
Abstract This is an attempt to predict the next fifteen years of geodynamo theory, and to assess the success potential of current directions of research. A new phenomenon, the subcriticality of a model-Z geodynamo, is described.
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Abstract This is an attempt to predict the next fifteen years of geodynamo theory, and to assess the success potential of current directions of research. A new phenomenon, the subcriticality of a model-Z geodynamo, is described.
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Constraining the heat flow out of a planetary core over geological time remains a significant challenge, asthe extreme pressures and temperatures involved push the limits of experimental capabilities. However,this heat flow is crucial for understanding planetary processes that are often linked to habitability inplanetary sciences. A geodynamo driven by
Louis Müller +2 more
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Louis Müller +2 more
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