[M-IS15] Global Antarctic Science: connecting the chain of changing huge ice sheets and global environments

Tue. May 27, 2025 1:45 PM - 3:15 PM 101 (International Conference Hall, Makuhari Messe)

convener:Takeshige Ishiwa(National Institute of Polar Research), Kazuya Kusahara(Japan Agency for Marine-Earth Science and Technology), Masahiro Minowa(Institute of Low Temperature Science, Hokkaido University), Mutusmi Iizuka(The National Institute of Advanced Industrial Science and Technology), Chairperson:Mutusmi Iizuka(The National Institute of Advanced Industrial Science and Technology)

Due to global warming, the Antarctic Ice Sheet (AIS) may be beyond a critical threshold, causing the global sea level rise at a faster rate than previously thought. The changes in AIS could trigger a cascade of global tipping points as ocean circulations. The timescale of these changes is various and has the different characteristics of the response. The complex interactions among the different spatiotemporal phenomena prevent improvement of future predictions. This session will promote interdisciplinary research related to the Southern Ocean and AIS, focusing on the changes in AIS, Southern Ocean circulations and ecosystems from the past to present, which is essential for accurately understanding global environmental changes. Also, the session will comprehensively discuss the latest observational and model simulation results and proposals for new research observations. This session is assigned as a Japanese session, but presentations in English are also welcome.

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1:45 PM - 2:00 PM

[MIS15-13] Response of Cape Darnley Bottom Water formation to sea ice and ice sheet variations during MIS 11

★Invited Papers

*Keiko Takehara¹, Yuji Kato², Yoshihiro Nakayama³, Mutsumi Iizuka⁴, Xiangyu Zhao⁵, Takuya Itaki⁴, Yusuke Suganuma⁶, Vigan Mensah¹, Osamu Seki¹, Kay I. Ohshima¹, Minoru Ikehara² (1.Institute of Low Temperature Science, Hokkaido University, 2.Marine Core Research Institute, Kochi University, 3.Dartmouth College, 4.Geological Survey of Japan, AIST, 5.Shanghai Jiao Tong University, 6.National Institute of Polar Research)

2:00 PM - 2:15 PM

[MIS15-14] The southward shift of the Antarctic Polar Front and the westerlies during the last interglacial (MIS 5e) and their impact on the climate system

*Minoru Ikehara¹, Matthieu Civel-Mazens², Xavier Crosta³, Hiroki Matsui⁴ (1.Marine Core Research Institute, Kochi University, 2.LEMAR (UBO, CNRS, IRD, Ifremer), 3.University of Bordeaux, 4.Akita University)

2:15 PM - 2:30 PM

[MIS15-15] Planktic foraminiferal assemblages track fronts' migrations in the Indian sector of the Southern Ocean over the past 1.1 million years

*Hiroki Matsui¹, Megumi Hirayama¹, Kentaro Sawada¹, Xavier Crosta², Minoru Ikehara³ (1.Akita University, 2.University of Bordeaux, France, 3.Marine Core Research Institute, Kochi University)

2:30 PM - 2:45 PM

[MIS15-16] Evaluation and establishment of CDW proxy based on Be isotope distribution of surface marine sediments from East Antarctica

*Yuri Yamazaki¹, Yusuke Suganuma^2,1, Takuya Itaki³, Atsuko Amano³, Takeshige Ishiwa^2,1, Motohiro Hirabayashi^2,1, Hiroyuki Matsuzaki⁴, Takeyasu Yamagata⁴, Jun'ichi Okuno^5,2,1, Daisuke Hirano^2,1, Takeshi Tamura^2,1, Keiji Misawa^2,1, Kosei E Yamaguchi⁶ (1.The Graduate University for Advanced Study, SOKENDAI, 2.National International Polar Research, 3.Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology, 4.Tokyo University, 5. Joint Support-Center for Data Science Research, Research Organization of Information and Systems, 6.Toho University)

2:45 PM - 3:00 PM

[MIS15-17] Distribution of neodymium isotopic compositions in seawater off Cape Darnley and characteristics of Antarctic bottom waters by formation area

*Yukiko Kozaka^1,2,3, Chandranath Basak¹, Keiji Horikawa⁴, Yoshihiko Ohashi⁵, Michiyo Yamamoto-Kawai⁶, Kay I. Ohshima⁷, Minoru Ikehara² (1.Department of Earth Sciences, University of Delaware, 2.Marine Core Research Institute, Kochi University, 3.Institute of Science and Engineering, Kanazawa University, 4.Faculty of Science, Academic Assembly, University of Toyama, 5.National Institute of Polar Research, 6.Tokyo University of Marine Science and Technology, 7.Institute of Low Temperature Science, Hokkaido University)

3:00 PM - 3:15 PM

[MIS15-18] Development of the Under Ice AUV “MONACA” - Autonomous Operations in Antarctica at JARE 64th and 66th -

Hirokazu Yamagata¹, Yuki Sekimori¹, Kazushi Yamamoto¹, Ryosuke Makabe², Masakazu Fujii², Hiroshi Yoshida³, Takeshi Tamura², Yoshifumi Nogi², *Toshihiro Maki¹ (1.The University of Tokyo, 2.National Institute of Polar Research, 3.Japan Agency for Marine-Earth Science and Technology)

Session information