Correlation Between Decay Rate and Amplitude of Solar Cycles as Revealed from Observations and Dynamo Theory

Hazra, Gopal and Karak, Bidya Binay and Banerjee, Dipankar and Choudhuri, Arnab Rai (2015) Correlation Between Decay Rate and Amplitude of Solar Cycles as Revealed from Observations and Dynamo Theory. In: SOLAR PHYSICS, 290 (6). pp. 1851-1870.

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Abstract

Using different proxies of solar activity, we have studied the following features of the solar cycle: i) The linear correlation between the amplitude of cycle and its decay rate, ii) the linear correlation between the amplitude of cycle and the decay rate of cycle , and iii) the anti-correlation between the amplitude of cycle and the period of cycle . Features ii) and iii) are very useful because they provide precursors for future cycles. We have reproduced these features using a flux-transport dynamo model with stochastic fluctuations in the Babcock-Leighton effect and in the meridional circulation. Only when we introduce fluctuations in meridional circulation, are we able to reproduce different observed features of the solar cycle. We discuss the possible reasons for these correlations.

Item Type:	Journal Article
Publication:	SOLAR PHYSICS
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Keywords:	Magnetic fields, models; Solar cycle, observations; Solar cycle, models
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	19 Aug 2015 06:29
Last Modified:	19 Aug 2015 06:29
URI:	http://eprints.iisc.ac.in/id/eprint/52154

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