Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2007-06-12
Nonlinear Sciences
Chaotic Dynamics
Submitted to Europhysics Letters (LaTex, 12 pgs, 5 figures)
Scientific paper
10.1016/j.physa.2008.01.110
We investigate the effects of a time-correlated noise on an extended chaotic system. The chosen model is the Lorenz'96, a kind of "toy" model used for climate studies. Through the analysis of the system's time evolution and its time and space correlations, we have obtained numerical evidence for two stochastic resonance-like behavior. Such behavior is seen when both, the usual and a generalized signal-to-noise ratio function are depicted as a function of the external noise intensity or the system size. The underlying mechanism seems to be associated to a "noise-induced chaos reduction". The possible relevance of these and other findings for an "optimal" climate prediction are discussed.
Revelli Jorge A.
Rodriguez Miguel A.
Wio Horacio S.
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