A better-ventilated ocean triggered by Late Cretaceous changes in continental configuration.

摘要: Oceanic anoxic events (OAEs) are large-scale of oxygen depletion in the deep ocean that happened during pre-Cenozoic periods extreme warmth. Here, to assess role major continental configuration changes occurring Late Cretaceous on oceanic circulation modes, which turn influence oxygenation level ocean, we use a coupled atmosphere climate model. We simulate dynamics two different time slices and compare these with existing neodymium isotope data (eNd). Although deep-water production North Pacific is continuous, simulations at 94 71 Ma show shift southern sites from South Atlantic Indian Ocean locations. Our modelling results support hypothesis an intensification reversal fluxes through Caribbean Seaway were main causes decrease eNd values recorded waters Cretaceous.