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

Evan J. Gowan; Paul Tregoning; Anthony Purcell; James Lea; Oscar J. Fransner; Riko Noormets; J. A. Dowdeswell

doi:10.5194/gmd-9-1673-2016

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

Evan J. Gowan^*, Paul Tregoning, Anthony Purcell, James Lea, Oscar J. Fransner, Riko Noormets, J. A. Dowdeswell

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1673-1682
Number of pages	10
Journal	Geoscientific Model Development
Volume	9
Issue number	5
DOIs	https://doi.org/10.5194/gmd-9-1673-2016
Publication status	Published - 3 May 2016

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abstract = "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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AU - Dowdeswell, J. A.

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

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