Coherence resonance in paleoclimatic modeling

Abstract Through a unified mathematical framework, the stochastic behavior of three celebrated low-order lumped models, previously proposed for paleoclimate simulations, is considered. Due to coherence resonance mechanism, feedbacks between noise and dynamical system reproduce hallmark Pleistocene climate, i.e. 100 ky pulsation, in range model parameters that unexpectedly wide far from original modeling setting. In this way, issue arbitrary coefficient tuning approaches paleoclimatology can be partially bypassed. A stability analysis considered systems allowed parameter space exploited, order separate deterministic-dominated region stochastic-dominated region. Noise intensity varied closeness Hopf bifurcations and/or bistable conditions investigated understand what make models prone with 100-ky or without forcing induced by varying astronomical parameters.