[M-IS10] [EJ] 南大洋・南極氷床が駆動する全球気候変動

[MIS10-13] 大気海洋結合モデルや氷床モデルを組み合わせた過去から将来の南極南大洋の統合的モデリングの現状

*阿部 彩子¹、齋藤 冬樹²、吉森 正和³、岡 顕¹、Greve Ralf³、植原 啓太¹、陳 永利¹ (1.東京大学大気海洋研究所、2.海洋研究開発機構、3.北海道大学)

キーワード：古気候、気候モデリング、南極氷床

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.