JpGU-AGU Joint Meeting 2020

Presentation information

[E] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS15] Global climate change driven by the Southern Ocean and the Antarctic Ice Sheet

convener:Osamu Seki(Institute of Low Temperature Science, Hokkaido University), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Yoshifumi Nogi(National Institute of Polar Research), Robin Elizabeth Bell(Lamont Doherty Earth Observatory)

[MIS15-P21] Summary of the 3rd Year Activities of the Project on the Interaction of the solid Earth and the
Antarctic Ice Sheet

*Yoichi Fukuda1, Jun Nishijima2, Takahito Kazama1, Kazuki Nakamura3, Koichiro Doi4, Yusuke Suganuma4, Jun'ichi Okuno4, Akito Araya5, Heitaro Kaneda6, Yuichi Aoyama4, Hideki Miura4 (1.Department of Geophysics, Graduate School of Science, Kyoto University, 2.Graduate School of Engineering, Kyushu University, 3.Faculty of Engineering, Nihon University, 4.National Institute of Polar Research, 5.ERI, University of Tokyo, 6.Graduate School of Science, Chiba University)

Keywords:Glacial Isostatic Adjustment, Ice sheet changes, Sea level rise, East Antarctica

A five years research project funded by JSPS (Japan Society for the Promotion of Science) has been started in July 2017. The title of the project is "Giant reservoirs of heat/water/material: Global environmental changes driven by Southern Ocean and Antarctic Ice Sheet" and is aiming to establish a new research area for Antarctic environmental system science. The project consists of 7 research topics, including Antarctic ice sheet and Southern ocean sciences, new observation methodology, modeling and other interdisciplinary topics, and we are involved in the topic, "Interaction of the solid Earth and the Antarctic Ice Sheet".

The Antarctic ice sheet is an essential element of the Earth system for predicting the future environment changes. Thus many studies have been conducted by means of geomorphological, geological, geodetic surveys, as well as satellite observations. For these studies, one of the largest uncertainties is the effects of GIA and the main reason of the uncertainties come from insufficient in-site observations. Thus we planned to conduct geomorphological, geological and geodetic surveys in the outcrop areas and the coastal areas in East Antarctica. Combining these new observations with other in-site data, various satellite data and numerical modeling, we aim to estimating a precise GIA model, constructing a reliable ice melting history after the last glacial maximum and obtaining the viscoelastic structure of the Earth's interior.

As the third year activities, we conducted absolute gravity measurements in Korean Jang Bogo station and Itarian Marrio Zucchelli station, boring core sampling and geomorphological surveys near Indian Maitri Station as well as several data analyses, numerical modeling, and other related studies.

In this presentation, we report these activities and the results so far obtained, and the observation/research plans in 2020 as well.

This study was partially supported by JSPS KAKENHI Grant No. 17H06321.