日本地球惑星科学連合2018年大会

講演情報

[EE] ポスター発表

セッション記号 S (固体地球科学) » S-CG 固体地球科学複合領域・一般

[S-CG55] Various interactions between solid Earth and climates

2018年5月21日(月) 13:45 〜 15:15 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:中川 貴司(海洋研究開発機構数理科学・先端技術研究分野)、横山 祐典(東京大学 大気海洋研究所 高解像度環境解析研究センター)、奥野 淳一(国立極地研究所、共同)、山崎 雅(産業技術総合研究所)

[SCG55-P02] Northern Hemisphere ice-sheets simulation using a coupled ice-sheet/earth rebound/climate model

*齋藤 冬樹1Abe-Ouchi Ayako2,1Okuno Jun'ichi3 (1.JAMSTEC、2.AORI Univ. Tokyo、3.NIPR)

キーワード:Ice-sheet modeling、Isostatic rebound

Feedback between changes in the ice-sheet/climate and the earth's isostatic rebound is considered to be a key process for the evolution of the past Northern Hemisphere ice-sheets in glacial cycles. We report numerical experiments of the past northern hemisphere ice-sheets during several hundred thousands years using a coupled ice-sheet/earth rebound model with combination of climate parameterization computed based on a series of sensitivity studies using the general circulation model MIROC (Abe-Ouchi 2013). A self-gravitating visco-elastic multi-layer model developed by Okuno and Nakada (2001) is coupled to an numerical ice-sheet model IcIES (Abe-Ouchi 2013). The results are compared with the previous IcIES results which coupled with a simple isostatic model (i.e., a local lithosphere/relaxing asthenosphere) which is controled by two parameters (the mantle density and the time scale of isostatic response), in order to discuss the effect of more realistic visco-elastic structure of the earth.