Resonant phenomena in extended chaotic systems subject to external noise: the Lorenz'96 model case
arXiv:0706.1672 · doi:10.1016/j.physa.2008.01.110
Abstract
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.
arXiv commentSubmitted to Europhysics Letters (LaTex, 12 pgs, 5 figures)
References in corpus (11)
- Brownian motors: noisy transport far from equilibrium
- Testing for Chaos in Deterministic Systems with Noise
- System size resonance in coupled noisy systems and in the Ising model
- Disordering effects of color in nonequilibrium phase transitions induced by multiplicative noise
- Nonequilibrium phase transitions induced by multiplicative noise: effects of self-correlation
- Transition from anomalous to normal hysteresis in a system of coupled Brownian motors: a mean field approach
- On the Influence of Noise on the Critical and Oscillatory Behavior of a Predator-Prey Model: Coherent Stochastic Resonance at the Proper Frequency
- Stochastic Resonance in Spatially Extended Systems: The Role of Far from Equilibrium Potentials
- System Size Stochastic Resonance: General Nonequilibrium Potential Framework
- Aspects of stochastic resonance in reaction-diffusion systems: The nonequilibrium-potential approach
- Limit cycle induced by multiplicative noise in a system of coupled Brownian motors