ICESHEET 1.0: a program to produce paleo-ice sheet reconstructions with minimal assumptions

We describe a program that produces paleo-ice sheet reconstructions using an assumption of steady-state, perfectly plastic ice flow behaviour. It incorporates three input parameters: ice margin, basal shear stress and basal topography. Though it is unlikely that paleo-ice sheets were ever in complet...

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Bibliographic Details
Published in:Geoscientific Model Development
Main Authors: E. J. Gowan, P. Tregoning, A. Purcell, J. Lea, O. J. Fransner, R. Noormets, J. A. Dowdeswell
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2016
Subjects:
Geology
QE1-996.5
Barents Sea
Greenland
Ice Sheet
Sea ice
Online Access:https://doi.org/10.5194/gmd-9-1673-2016
https://doaj.org/article/1e7b9ed8a5b842ab82647605d94b0179
Description
Summary:We describe a program that produces paleo-ice sheet reconstructions using an assumption of steady-state, perfectly plastic ice flow behaviour. It incorporates three input parameters: ice margin, basal shear stress and basal topography. Though it is unlikely that paleo-ice sheets were ever in complete steady-state conditions, this method can produce an ice sheet without relying on complicated and unconstrained parameters such as climate and ice dynamics. This makes it advantageous to use in glacial-isostatic adjustment ice sheet modelling, which are often used as input parameters in global climate modelling simulations. We test this program by applying it to the modern Greenland Ice Sheet and Last Glacial Maximum Barents Sea Ice Sheet and demonstrate the optimal parameters that balance computational time and accuracy.

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