Three Branches of Dynamo Action
Geophysics
2017-12-22 v2
Abstract
In addition to the weak-dipolar state and to the fluctuating-multipolar state, widely discussed in the literature, a third regime has been identified in Dormy (2016). It corresponds to a strong-dipolar branch which appears to approach, in a numerically affordable regime, the magnetostrophic limit relevant to the dynamics of the Earth's core. We discuss the transitions between these states and point to the relevance of this strong-dipolar state to Geodynamo modelling.
Cite
@article{arxiv.1612.07655,
title = {Three Branches of Dynamo Action},
author = {Emmanuel Dormy and Ludivine Oruba and Ludovic Petitdemange},
journal= {arXiv preprint arXiv:1612.07655},
year = {2017}
}
Comments
21 pages, 12 figures Accepted Manuscript Fluid Dynamics Research (online 2 June 2017)