HR: 0800h
AN: H31C-02    [Abstracts]
TI: Generalization of the University of Toronto Glacial Systems Model: A New Numerical Framework with Unstructured Grids
AU: * Stuhne, G R
EM: gordan@atmosp.physics.utoronto.ca
AF: Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7, Canada
AU: Peltier, W R
EM: peltier@atmosp.physics.utoronto.ca
AF: Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7, Canada
AB: We will describe new work relating to the ongoing development and enhancement of the University of Toronto Glacial Systems Model (GSM). Various versions of the GSM have been successfully employed in the past for paleoclimate applications such as the simulation of the glacial history of Greenland. The overall modelling framework has accumulated many advanced features, including the capacity to simulate glacial isostatic adjustment and the logic for automatic neural network optimization of parameters with respect to sparse observational data. The full exploitation and extension of such features has, however, been limited by the software organization of earlier versions of the GSM modelling system. For this reason, we have undertaken to formulate an updated GSM model based on an ocean modelling framework that we developed previously. One of the new features that will come out of this work is the capacity to use unstructured grids in ice-sheet modelling. When spatial domains are discretized using general triangulations, resolution can be arbitrarily enhanced near dynamically crucial ice margins and ice streams. We aim to demonstrate some of the enhanced GSM features in the context of Greenland ice-sheet simulations.
DE: 0700 CRYOSPHERE (4540)
DE: 0798 Modeling
SC: Hydrology [H]
MN: 2009 Joint Assembly