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Is meridional circulation important in modelling irregularities of the solar cycle?

Published online by Cambridge University Press:  05 July 2012

Bidya Binay Karak  and
Arnab Rai Choudhuri
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
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Abstract

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We explore the importance of meridional circulation variations in modelling the irregularities of the solar cycle by using the flux transport dynamo model. We show that a fluctuating meridional circulation can reproduce some features of the solar cycle like the Waldmeier effect and the grand minimum. However, we get all these results only if the value of the turbulent diffusivity in the convection zone is reasonably high.

Keywords

Sun: dynamo — Sun: activity — sunspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S286: Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars , October 2011 , pp. 367 - 371
Copyright
Copyright © International Astronomical Union 2012

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