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Volume :17 Issue : 1 1990
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A threshold model with piece-wise non-linear dynamics for sunspot series
Auther : B.Y. THANOON
Department of Mathematics and Statistics, College of Science, University of Mosul, Mosul, Iraq
ABSTRACT
A model with piece-wise non-linear dynamics is proposed for the sunspot time series 1700-1920 as a modification of a model fitted by Tong & Lim (1980). The proposed model provides a description of the solar cycle similar to that of a different type of model proposed by Yoshimura (1979).