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Modelling grand minima of solar activity using a flux transport dynamo model

Published online by Cambridge University Press:  18 July 2013

Bidya Binay Karak
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India email: bidya_karak@physics.iisc.ernet.in
Arnab Rai Choudhuri
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India email: bidya_karak@physics.iisc.ernet.in
Corresponding
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Abstract

The occurrence of grand minima like the Maunder minimum is an intriguing aspect of the sunspot cycle. We use the flux transport dynamo model to explain the grand minima, showing that they arise when either the poloidal field or the meridional circulation falls to a sufficiently low value due to fluctuations. Assuming these fluctuations to be Gaussian and determining the various parameters from the data of the last 28 cycles, we carry on a dynamo simulation with both these fluctuations. The results are remarkably close to the observational data.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

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Modelling grand minima of solar activity using a flux transport dynamo model
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