[M-IS15] 南大洋・南極氷床が駆動する全球気候変動

[MIS15-P27] Preliminary results of the JARE 61 geomorphological survey at Langhovde in Lutzow Holm Bay, East Antarctica

*石輪 健樹¹、徳田 悠希²、板木 拓也³、佐々木 聡史⁴、菅沼 悠介¹、山崎 新太郎⁵ (1.国立極地研究所、2.公立鳥取環境大学、3.産業技術総合研究所、4.島根大学、5.京都大学防災研究所)

キーワード：日本南極地域観測隊、南極氷床変動、地形調査

The mass loss of the Antarctic Ice Sheet due to the global climate changes will largely contribute to global sea-level rise. The information of present ice-sheet mass balance is required to achieve an accurate projection of Antarctic Ice Sheet changes. The timing and amplitude of Antarctic Ice Sheet change during the Last Deglaciation is essential to assess a glacial isostatic adjustments effect on the present ice-sheet mass balance. However, the difficulty of access to Antarctica makes it challenging to obtain field-based evidence of ice-sheet and sea-level change during the Last Deglaciation. In the 61st Japanese Antarctic Research Expedition (JARE61), the geomorphological survey was carried out in Langhovde and West Ongul Island in Lutzow Holm Bay, East Antarctica. We will report the preliminary results of JARE 61 such as the bathymetry data, CTD profiles, and sampling locations in shallow water and Lake Nurume of Langhovde. These data will be used to obtain the geological evidence of paleoenvironmental changes due to sea-level and ice-sheet fluctuation in future studies.