Japan Geoscience Union Meeting 2018

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[EJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS06] Global climate change driven by the Southern Ocean and the Antarctic Ice Sheet

Mon. May 21, 2018 3:30 PM - 5:00 PM 302 (3F International Conference Hall, Makuhari Messe)

convener:Osamu Seki(Institute of Low Temperature Science, Hokkaido University), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Ryosuke Makabe(国立極地研究所, 共同), Ryu Uemura(University of the Ryukyus), Chairperson:Fukuda Yoichi(Kyoto University), Oyabu Ikumi(National Institute of Polar Research)

4:15 PM - 4:30 PM

[MIS06-15] A sea-level fingerprinting analysis by glacial isostatic adjustment modeling for the Antarctic Ice Sheet change from the Last Glacial Maximum to the Holocene

*Takeshige Ishiwa1, Jun'ichi Okuno1,2 (1.National Institute of Polar Research, 2.SOKENDAI)

Keywords:Glacial Isostatic Adjustment, Antarctic Ice Sheet

Present Antarctic Ice Sheet (AIS) is the most massive freshwater storage in the Earth’s surface and interacts with global climate changes. The wide range of AIS component (5–30 m ice volume equivalent sea level) occurs during the Last Glacial Maximum (Clark and Tarasov, 2014). Moreover, the AIS history from the Last Glacial Maximum to the Holocene remains unclear due to lacking direct evidence of ice-sheet change. In this presentation, we use a sea-level fingerprinting analysis by glacial isostatic adjustment (GIA) model to estimate the AIS change from the LGM to the Holocene. Near-, far- and intermediate- field sea-level data as Antarctica, the Barbados corals, and the Bonaparte Gulf sediments would provide crucial information of AIS change. This constraint leads to further understanding of global climate change and AIS history and also future climate changes represented by a sea-level rising due to AIS mass loss.