Perspectives on a Seamless Marine-lake Sediment Coring Study in East Antarctica

The Antarctic Ice Sheet (AIS) is one of the largest potential contributors to future sea-level changes. Recently, an acceleration of AIS volume loss through basal melting and iceberg calving has been reported based on several studies using satellite observations, including radar altimetry, interfero...

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Bibliographic Details
Published in:Journal of Geography (Chigaku Zasshi)
Main Authors: Suganuma, Yusuke, Ishiwa, Takeshige, Kawamata, Moto, Okuno, Jun'chi, Katsuki, Kota, Itaki, Takuya, Seki, Osamu, Kaneda, Heitaro, Matsui, Hiroki, Haneda, Yuki, Fujii, Masakazu, Hirano, Daisuke
Format: Article in Journal/Newspaper
Language:Japanese
Published: Tokyo Geographical Society
Subjects:
East Antarctica
Antarctic Ice Sheet (AIS)
sea-level change
seamless sediment coring
Glacial Isostatic Adjustment (GIA)
450
Antarctic
The Antarctic
Antarc*
Antarctica
Ice Sheet
Ice Shelves
Iceberg*
Online Access:http://hdl.handle.net/2115/80291
https://doi.org/10.5026/jgeography.129.591
Description
Summary:The Antarctic Ice Sheet (AIS) is one of the largest potential contributors to future sea-level changes. Recently, an acceleration of AIS volume loss through basal melting and iceberg calving has been reported based on several studies using satellite observations, including radar altimetry, interferometer, and gravity measurements. A recent model that couples ice sheet and climate dynamics and incorporates hydrofracturing mechanism of buttressing ice shelves predicts a higher sea-level rise scenario for the next 500 years. However, the calibration and reproducibility of the sea-level rise projection from these models relies on geological sea-level reconstructions of past warm intervals. This suggests that a highly reliable reconstruction of the past AIS is essential for evaluating its stability and anticipating its contribution to future sea-level rise. In particular, a relative sea-level reconstruction in East Antarctica is the key to solving the problems and refining future projections. The current understanding of sea-level change along the East Antarctic margin is reviewed, including Glacial Isostatic Adjustment (GIA) effects, and a new strategy is proposed to address this topic based on seamless sediment coring from marine to lake in the East Antarctic margin. This project will provide essential data on AIS change since the last interglacial period.

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