Weiss, NO and Tobias, SM (2016) Super-modulation of the Sun’s magnetic activity: the effects of symmetry changes. Monthly Notices of the Royal Astronomical Society, 456 (3). pp. 2654-2661. ISSN 0035-8711
Abstract
In this paper we argue that the solar activity record, as revealed by telescopic observations and proxy data from the abundances of cosmogenic isotopes, is consistent with the action of a deterministic nonlinear chaotic dynamo. In particular we claim that the long timescale ‘super-modulation’ apparent in the isotopic record can be ascribed to switching of the dynamo between two different modulational patterns. The first (which is currently in operation) involves deep grand minima and occasional changes in symmetry triggered by these minima. The second, which exhibits only weak modulation and no grand minima, arises as a consequence of symmetry breaking. These processes are demonstrated for highly idealized simple models of the nonlinear dynamo equations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Weiss, NO and Tobias, SM (2016) Super-modulation of the Sun’s magnetic activity: the effects of symmetry changes. Monthly Notices of the Royal Astronomical Society, 456 (3). pp. 2654-2661 is available online at:http://dx.doi.org/10.1093/mnras/stv2769 |
Keywords: | dynamo – sun; sunspots – activity – magnetic fields |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Dec 2015 12:45 |
Last Modified: | 17 Jan 2018 05:07 |
Published Version: | http://dx.doi.org/10.1093/mnras/stv2769 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Identification Number: | 10.1093/mnras/stv2769 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:92244 |