5:15 PM - 6:30 PM
[MIS17-P29] The warm climate of the Mid to Late Pliocene as seen in MIROC climate modelling experiments
Keywords:Pliocene, Climate modelling, Paleoceanography
We ran several Pliocene climate modelling experiments using the atmosphere-ocean coupled model, MIROC4m. These include experiments using the boundary conditions specified in the first phase of PlioMIP in addition to one which has incorporated most of the latest datasets from the second phase. Zonal mean surface air temperatures increase by about 10 deg C at high latitudes, accompanied by a decrease in the equator-to-pole temperature gradient. As with many other climate models, the polar amplification appears smaller than that suggested by proxy data in PlioMIP. Initial results from experiments using the latest boundary conditions, in particular a closed Bering Strait, suggest that this amplification is further weakened.