[M-IS10] [EJ] Global climate change driven by the Southern Ocean and the Antarctic Ice Sheet

[MIS10-13] Current climate-ice sheet studies related to Antarctica and Souther ocean ocean using Earth system modells

*Ayako Abe-Ouchi¹, Fuyuki SAITO², Masakazu Yoshimori³, Akira Oka¹, Ralf Greve³, Keita Uehara¹, Wing-Le Chan¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.JAMSTEC, 3.Hokkaido University)

Keywords:paleoclimate, Climate modeling, Antarctica ice sheet

Climate-Antarctica ice sheet and Southern ocean interaction not only affects the local climate but also affect the global climate and ocean. We present some of our current modelling studies and plan using coupled atmophere and ocean model and ice sheet model. In one of our studies, Eocene experiments were carried out to test the model’s ability to reproduce proxy data and to investigate the climate system under high CO₂ concentration. Furthermore, in order to investigate to what extent topographical changes are responsible for the difference between the Eocene and present day climates, we created Eocene-like geometries from the present day topography. We present the individual effects of the Drake Passage, Tasman Gateway, Antarctica Ice Sheet on the climate.