The Case for a Distributed Solar Dynamo Shaped by Near‐Surface Shear
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- 20 May 2005
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 625 (1) , 539-547
- https://doi.org/10.1086/429584
Abstract
Arguments for and against the widely accepted picture of a solar dynamo being seated in the tachocline are reviewed, and alternative ideas concerning dynamos operating in the bulk of the convection zone, or perhaps even in the near-surface shear layer, are discussed. Based on the angular velocities of magnetic tracers, it is argued that the observations are compatible with a distributed dynamo that may be strongly shaped by the near-surface shear layer. Direct simulations of dynamo action in a slab with turbulence and shear are presented to discuss filling factor and tilt angles of bipolar regions in such a model.Keywords
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