[M-IS05] Global climate change driven by the Southern Ocean and the Antarctic Ice Sheet

Sun. Jun 6, 2021 1:45 PM - 3:15 PM Ch.11 (Zoom Room 11)

convener:Osamu Seki(Institute of Low Temperature Science, Hokkaido University), Yoshifumi Nogi(National Institute of Polar Research), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Yusuke Suganuma(National institute of Polar Research), Chairperson:Hiroki Matsui(Graduate School of International Resource Sciences, Akita University), Takeshige Ishiwa(National Institute of Polar Research)

The Southern Ocean and Antarctic ice sheet, which are the giant reservoirs of heat, water, and materials, have a potential to play central roles in long-term global climate change. This system is composed of the following sub-systems; ice shelf which is a place of the interaction of ice sheet and ocean, flowing iceberg, seasonal sea ice zone, Antarctic bottom water which drives the thermohaline circulation, active biological production and Antarctic Circumpolar Current. These sub-systems are interacted with each other and have significant impact on changes in the global environmental system. This session aim to summarize recent observational and simulation studies from various fields relating to the past and present changes in the Antarctic Ice sheet and Southern Ocean, which are essential elements for unraveling the changes in the global climate system. Further, future science plans for understanding of the environmental changes of the Antarctic Cryosphere is also discussed.

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1:45 PM - 2:00 PM

[MIS05-06] Beryllium isotope records from sectors of the West and East Antarctic Ice sheet reveal Holocene melting related to the incursion of Circumpolar Deep Water

*Adam David Sproson^1,2, Yusuke Yokoyama^1,2, Yoshinori Takano², Rebecca Minzoni³, Bethany Behrens¹, Yosuke Miyairi¹, Takahiro Aze¹ (1.Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan. , 2.Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan. , 3.Department of Geological Sciences, The University of Alabama, USA.)

2:00 PM - 2:15 PM

[MIS05-07] Abrupt Holocene ice-sheet retreat in Lutzow-Holm Bay, East Antarctica

*Yusuke Suganuma^1,2, Yuki Haneda³, Takuya Itaki³, Osamu Seki⁴, Takeshige Ishiwa¹, Moto Kawamata², Masakazu Fujii^1,2, Kazuya Kusahara⁸, Daisuke Hirano⁴, Masao Iwai⁹, Yuji Kato⁹, Hiroki Matsui⁶, Atsuko Amano³, Kota Katsuki⁵, Takayuki Omori⁷, Motohiro Hirabayashi¹, Hiroyuki Matsuzaki⁷, Takeyasu Yamagata⁷, Masato Ito⁸, Shin Sugiyama⁴, Naohisa Nishida¹⁰, Jun'ichi Okuno^1,2, Minoru Ikehara⁹, Hideki Miura^1,2 (1.National institute of Polar Research, 2.The Graduate University for Advanced Studies (SOKENDAI), 3.Geological Survey of Japan, AIST, 4.Hokkaido University, 5.Shimane University, 6.Akita University, 7.University of Tokyo, 8.JAMSTEC, 9.Center for Advanced Marine Core Research, Kochi University, 10.Tokyo Gakugei University)

2:15 PM - 2:30 PM

[MIS05-08] Paleoenvironmental reconstruction using lake sediment cores from Lake Nurume in Lützow Holm Bay

*Takeshige Ishiwa¹, Yuki Tokuda², Takuya Itaki³, Satoshi Sasaki⁴, Kota Katsuki⁴, Yusuke Suganuma^1,5 (1.National Institute of Polar Research, 2.Tottori University of Environmental Studies, 3.National Institute of Advanced Industrial Science and Technology, 4.Shimane University, 5.The Graduate University for Advanced Studies (SOKENDAI))

2:30 PM - 2:45 PM

[MIS05-09] Assessing dust-magnetic correlation in the Indian sector of the Southern Ocean

*Hiroki Matsui¹, Minoru Ikehara², Yusuke Suganuma^3,4, Osamu Seki⁵, Ikumi Oyabu³, Kenji Kawamura^3,4 (1.Graduate School of International Resource Sciences, Akita University, 2.Center for Advanced Marine Core Research, Kochi University, 3.National Institute of Polar Research, Research Organization of Information and Systems, 4.Department of Polar Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies (SOKENDAI), 5.Institute of Low Temperature Science, Hokkaido University)

2:45 PM - 3:00 PM

[MIS05-10] Antarctic warmth in the last interglacial driven by Northern insolation and deglaciation

*Takashi Obase¹, Ayako Abe-Ouchi^1,2, Fuyuki SAITO³ (1.Atmosphere and Ocean Research Institute, the University of Tokyo, 2.National Institute of Polar Research, Japan, 3.Japan Agency for Marine-Earth Science and Technology)

3:00 PM - 3:15 PM

[MIS05-11] Modeling the ocean carbon cycle during the last deglaciation

*Hidetaka Kobayashi¹, Akira Oka¹, Takashi Obase¹, Ayako Abe-Ouchi¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo)

Session information