Solar Magnetic Field Reversals and the Role of Dynamo Families

Abstract

The variable magnetic field of the solar photosphere exhibits periodic reversals as a result of dynamo activity occurring within the solar interior. We decompose the surface field as observed by both the Wilcox Solar Observatory and the Michelson Doppler Imager into its harmonic constituents, and present the time evolution of the mode coefficients for the past three sunspot cycles. The interplay between the various modes is then interpreted from the perspective of general dynamo theory, where the coupling between the primary and secondary families of modes is found to correlate with large-scale polarity reversals for many examples of cyclic dynamos. Mean-field dynamos based on the solar parameter regime are then used to explore how such couplings may result in the various long-term trends in the surface magnetic field observed to occur in the solar case.

Accepted to ApJ; comments/corrections to this article are welcome via e-mail, even after publication

References in corpus (10)

• Global-Scale Turbulent Convection and Magnetic Dynamo Action in the Solar Envelope
• Generation of magnetic field by dynamo action in a turbulent flow of liquid sodium
• A solar surface dynamo
• Toroidal versus poloidal magnetic fields in Sun-like stars: a rotation threshold
• Exploring the Physical Basis of Solar Cycle Predictions: Flux Transport Dynamics and Persistence of Memory in Advection versus Diffusion Dominated Solar Convection Zones
• A simple mechanism for the reversals of Earth's magnetic field
• The unusual minimum of sunspot cycle 23 a consequence of Sun's meridional plasma flow variations
• On the role of meridional flows in flux transport dynamo models
• Importance of Meridional Circulation in Flux Transport Dynamo: The Possibility of a Maunder-like Grand Minimum
• Toroidal flux oscillation as possible cause of geomagnetic excursions and reversals

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