Early-warning signals for Cenozoic climate transitions

Deep-time paleoclimatic records document large-scale shifts and perturbations in Earth's climate; during the Cenozoic particular transitions have been recorded on time scales of 10 thousand to 1 million years. Bifurcations leading dynamical modes could be a key element driving these events. Such bifurcation-induced critical are typically preceded by characteristic early-warning signals, for example terms rising standard deviation lag-one autocorrelation. These signals generated widening underlying basin attraction when approaching bifurcation, phenomenon dubbed slowing down. The associated should therefore that can detected statistical methods. Here, we reveal presence significant prior several climate events within paleoclimate record spanning last 66 years - Era. We computed autocorrelation CENOzoic Global Reference benthic foraminifer carbon oxygen Isotope Dataset (CENOGRID), comprising two series deep sea carbonate isotope variations 18O 13C. find five out nine previously identified at least one records, which considered as viable candidates analysed follow-up studies. Our results suggest some major Ma were triggered bifurcations variability, indicating component system deep-time evolution.