[M-IS08] Global climate change driven by the Southern Ocean and the Antarctic Ice Sheet

[MIS08-P03] Transient simulation of Antarctic ice sheet using a high-resolution numerical ice-sheet model for oldest-ice core topic.

*Fuyuki SAITO¹, Takashi Obase², Ayako Abe-Ouchi² (1.Japan Agency for Marine-Earth Science and Technology, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, Japan)

Keywords:Antarctic ice sheet

Ice divides are important locations for deep drilling on ice-sheets. Precise computation around a divide requires spatially very high resolution due to the characteristics of ice-flow around the divide. There are several methods to compute the age of ice. One is to apply a very high resolution 1-d column model on target sites. In this case the history of ice-sheet thickness and velocity is needed to be specified, which can be obtained using 3-d transient ice sheet models. Starting from Saito (2002), a series of numerical experiments of Antarctic ice sheet using an ice-sheet model IcIES has been presented, with repeating major and minor changes around the ice-sheet model and its configuration.Possibility of changes in the position and elevation of Dome Fuji and changes in the long-term ice-sheet volume, driven by the evolution of glacial/interglacial climate, as well as a variety of ice-grounded area have been discussed.
In this study, the work of Saito et al (2018, JpGU) is once more updated using a latest version of IcIES with higher resolution (8km). Several improvements are included from the previous study: Update of the reference bedrock topography; Improving vertical resolution; etc.