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-P06] Relation between depth of the continental shelf and surface mass loads around the Antarctica

*奥野 淳一1,2三浦 英樹1,2野木 義史1,2早河 秀章3 (1.国立極地研究所、2.総合研究大学院大学、3.東京大学宇宙線研究所)

キーワード:大陸棚、南極、アイソスタシー

The depth of the continental margin around the Antarctica has been observed about -500~-900 m depth, and there is the place that reaches -1,000 m in some places. Clearly, the depth of the continental shelf around the Antarctica is very deep in comparison with that of the other continental margins in the world. These characteristics are expected to come from the surface mass loading by Antarctic ice sheet and ocean sediments around the Antarctica. However, very few quantitative evaluations have been reported on the relation between the depth of continental margin and surface mass loads in the Antarctica. In order to know the effect of the ice sheet fluctuation and accumulation of the sediment on the surface elevation change, we need to evaluate the isostatic deformation process due to surface mass loads numerically. In this presentation, we show the quantitative differences of the continental depth between the Antarctica and the other continents, and using the glacial isostatic adjustment (GIA) modelling, we estimate the effects of ice sheet and sediment loads on the depth distribution around the Antarctica.