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Abstract: We investigate the effects of a time-correlated noise on an extended chaoticsystem. The chosen model is the Lorenz-96, a kind of toy model used for climatestudies. The system is subjected to both temporal and spatiotemporalperturbations. Through the analysis of the system-s time evolution and its timecorrelations, we have obtained numerical evidence for two stochasticresonance-like behaviors. Such behavior is seen when a generalizedsignal-to-noise ratio function are depicted as a function of the external noiseintensity or as function of the system size. The underlying mechanism seems tobe associated to a noise-induced chaos reduction. The possible relevance ofthose findings for an optimal climate prediction are discussed, using ananalysis of the noise effects on the evolution of finite perturbations anderrors.



Autor: Jorge A. Revelli, Miguel A. Rodriguez, Horacio S. Wio IFCA, Spain

Fuente: https://arxiv.org/







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