Author： Pontieri A. Lepreti F. Sorriso-Valvo L. Vecchio A. Carbone V.
Publisher： Springer Publishing Company
ISSN： 0038-0938
Source： Solar Physics, Vol.213, Iss.1, 2003-03, pp. : 195-201
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Abstract
A simple nonlinear model which describes the 11-year solar cycle can be derived from the usual -&ohgr; dynamo theory in the form of a Van der Pol equation. Solar activity displays also small-scale inter-cycle persistent stochastic oscillations with a Hurst exponent of the order of
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