HR: 0800h
AN: C51A-0093    [Abstracts]
TI: Numerical improvement on simulation over the margin area of the Greenland ice sheet
AU: * SAITO, F
EM: saitofuyuki@jamstec.go.jp
AF: Japan Agency for Marine-Earth Science and Technology, Frontier Research Center for Global Change, 3173-25 Showamachi, Kanazawa-ku, Yokohama, 236-0001, Japan
AU: Abe-Ouchi, A
EM: abeouchi@ccsr.u-tokyo.ac.jp
AF: Japan Agency for Marine-Earth Science and Technology, Frontier Research Center for Global Change, 3173-25 Showamachi, Kanazawa-ku, Yokohama, 236-0001, Japan
AU: Abe-Ouchi, A
EM: abeouchi@ccsr.u-tokyo.ac.jp
AF: Center for Climate System Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8568, Japan
AU: Blatter, H
EM: heinz.blatter@env.ethz.ch
AF: Institute for Atmospheric and Climate Science, ETH Zurich, CHN L 11 Universitaetstrasse 16, Zurich, CH-8092, Switzerland
AB: Generally, simulated topography by an ice-sheet model has large error near the margin compared to the real (or analytical) ones. There are several reasons for the error near the margin, such as uncertain processes and parameters, ignored processes, and also the error due to numerical properties. Saito and Abe-Ouchi (2005) demonstrate that difference near the margin in the simulation may significantly affect the sensitivity experiment such as global warming experiments. Thus improvement on the simulation especially near the margin is a highly important subject. Saito et al. (2007) present an improved numerical scheme to reduce the error at the ice-sheet margin. In the present paper we applied the scheme to Greenland ice sheet to investigate its influence on simulated thickness and temperature. In addition, ignoring higher-order stress terms may have some effect on the error. We have been developing a model including higher-order stress components and had applied it to ideal configuration (e.g., Saito et al., 2006). In the present work, preliminary result will be also shown by the model applied to the Greenland ice sheet.
DE: 0726 Ice sheets
DE: 0730 Ice streams
DE: 0798 Modeling
SC: Cryosphere [C]
MN: 2007 Fall Meeting