THE SHIRASE FLOW-LINE MODEL : AN ADDITIONAL TOOL FOR INTERPRETING THE DOME-FUJI SIGNAL

• Main Authors: Frank PATTYN, Hugo DECLEIR
• Format: Report
• Language: English
• Published: Department of Geography, Vrije Universiteit Brussel 1998
• Subjects: Dome Fuji; Dome Fuji Station; Shirase Glacier; Antarc*; Antarctica; ice core; Polar meteorology and glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2872; http://id.nii.ac.jp/1291/00002872/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2872&item_no=1&attribute_id=18&file_no=1

Understanding both present and past ice dynamical behavior of the Shirase Glacier Basin (Antarctica) is an important factor for interpreting results of deep ice-core drilling at Dome Fuji Station. This paper compares preliminary flowline model experiments with tentative ice core dating and investigates the role of ice dynamics on the age-depth profile at the ice divide. Preliminary simulations demonstrated that the model is capable of reproducing realistic age-depth profiles at the ice divide, despite its coarse resolution. Sensitivity experiments showed that a proper determination of the present surface mass balance is a key factor in determining the age-depth relationship and that it is necessary to take into account past changes in accumulation rates. Finally, changes in the dynamic behavior of the coastal ice stream (Shirase Glacier), such as enhanced flow, hardly influence the age-depth profile at the ice divide.