Phipps, S and Halpin, J, The importance of geothermal heat flux in modelling of the Antarctic Ice Sheet, Geophysical Research Abstracts, 04-13 April 2018, Vienna, Austria, pp. 11314. ISSN 1607-7962 (2018) [Conference Extract]
Here, we use the Parallel Ice Sheet Model to explore the sensitivity of the simulated Antarctic Ice Sheet to the available geothermal heat flux (GHF) datasets. We find that the choice of GHF is a significant source of uncertainty, leading to basin-wide differences in excess of 1000m in the simulated ice thickness. Using different GHF datasets to drive the model, we then "tune" it by determining the optimal values of key physical parameters. We show that the parameter combinations obtained are sensitive to the choice of GHF.
Our results highlight the importance of GHF in ice sheet modelling. Reliable GHF estimates are critical to optimising numerical models of the Antarctic Ice Sheet and, therefore, to reducing uncertainty in projections of future global sea level rise.
|Item Type:||Conference Extract|
|Keywords:||Antarctica, geothermal heat flux, ice sheet modelling|
|Research Division:||Earth Sciences|
|Research Group:||Physical Geography and Environmental Geoscience|
|Objective Group:||Climate and Climate Change|
|Objective Field:||Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)|
|UTAS Author:||Phipps, S (Dr Steven Phipps)|
|UTAS Author:||Halpin, J (Dr Jacqueline Halpin)|
|Deposited By:||Oceans and Cryosphere|
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