[M-IS14] 南大洋・南極氷床が駆動する全球気候変動

[MIS14-08] Reconstruction of the East Antarctic ice sheet variability during the last 3 myrs in the central & eastern Droning Maud Land, East Antarctica

*菅沼 悠介^1,2、川又 基人²、香月 興太³、金丸 龍夫⁴、金田 平太郎⁵、小山 拓志⁶、田邊 優貴子^1,2、柴田 大輔⁷、石輪 健樹¹、板木 拓也⁸、奥野 淳一^1,2、関 宰⁹、須藤 斎¹⁰、藤井 昌和^1,2、三浦 英樹^1,2 (1.国立極地研究所、2.総合研究大学院大学、3.島根大学、4.日本大学、5.千葉大学、6.大分大学、7.筑波大学、8.産総研、9.北海道大学、10.名古屋大学)

キーワード：南大洋・南極氷床、固体班

Reconstructing past variability of the Antarctic ice sheets is essential to understand their stability and to anticipate their contribution to future sea level rise. However, magnitude and timing of ice sheet changes during the last several million years have not been well constrained, especially in central & eastern Droning Maud Land, East Antarctica. Recently, we have carried out several field campaigns in this area to reconstruct changes in thickness, geographical extent, and timing of retreat of the East Antarctic Ice Sheet based on the detailed geomorphological survey, cosmogenic exposure dating, and lake/shallow marine sediment records coupled with glacial isostatic adjustment modeling (GIA). In this presentation, we will introduce these recent achievements from the field campaigns and discuss scientific plans for the next few seasons.