De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum
The Last Glacial Maximum extent of the North American Ice Sheets are well constrained empirically, but have proven to be challenging to simulate with coupled Climate Ice Sheet models. Coupled Climate-Ice Sheet models are often too computationally expensive to sufficiently explore uncertainty in inpu...
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2023
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ftsheffhu:oai:shura.shu.ac.uk:32253 2023-08-27T04:09:47+02:00 De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum Gandy, Niall Astfalck, Lachlan Gregoire, Lauren Ivanovic, Ruza Patterson, Violet Sherriff-Tadano, Sam Smith, Robin Williamson, Daniel Rigby, Richard 2023-08-07 application/pdf https://shura.shu.ac.uk/32253/1/Detuning_a_coupled_climate_ice_sheet_model%20%288%29.pdf en eng American Geophysical Union and Wiley http://shura.shu.ac.uk/32253/ https://shura.shu.ac.uk/32253/1/Detuning_a_coupled_climate_ice_sheet_model%20%288%29.pdf GANDY, Niall, ASTFALCK, Lachlan, GREGOIRE, Lauren, IVANOVIC, Ruza, PATTERSON, Violet, SHERRIFF-TADANO, Sam, SMITH, Robin, WILLIAMSON, Daniel and RIGBY, Richard (2023). De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum. Journal of geophysical research. Earth surface. arr Article PeerReviewed 2023 ftsheffhu 2023-08-10T23:08:50Z The Last Glacial Maximum extent of the North American Ice Sheets are well constrained empirically, but have proven to be challenging to simulate with coupled Climate Ice Sheet models. Coupled Climate-Ice Sheet models are often too computationally expensive to sufficiently explore uncertainty in input parameters, and it is unlikely that values calibrated to reproduce modern ice sheets will reproduce the known extent of the ice at the Last Glacial Maximum. To address this, we run an ensemble with a coupled Climate-Ice Sheet model (FAMOUS-ice), simulating the final stages of growth of the last North American Ice Sheets’ maximum extent. Using this large ensemble approach, we explore the influence of numerous uncertain ice sheet albedo, ice sheet dynamics, atmospheric, and oceanic parameters on the ice sheet extent. We find that ice sheet albedo parameters determine the majority of uncertainty when simulating the Last Glacial Maximum North American Ice Sheets. Importantly, different albedo parameters are needed to produce a good match to the Last Glacial Maximum North American Ice Sheets than have previously been used to model the contemporary Greenland Ice Sheet, due to differences in cloud cover over ablation zones. Thus calibrating coupled climate-ice sheet models on one ice sheet may produce strong biases when the model is applied to a new domain. Article in Journal/Newspaper Greenland Ice Sheet SHURA (Sheffield Hallam University Research Archive) Greenland |
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Open Polar |
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SHURA (Sheffield Hallam University Research Archive) |
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ftsheffhu |
language |
English |
description |
The Last Glacial Maximum extent of the North American Ice Sheets are well constrained empirically, but have proven to be challenging to simulate with coupled Climate Ice Sheet models. Coupled Climate-Ice Sheet models are often too computationally expensive to sufficiently explore uncertainty in input parameters, and it is unlikely that values calibrated to reproduce modern ice sheets will reproduce the known extent of the ice at the Last Glacial Maximum. To address this, we run an ensemble with a coupled Climate-Ice Sheet model (FAMOUS-ice), simulating the final stages of growth of the last North American Ice Sheets’ maximum extent. Using this large ensemble approach, we explore the influence of numerous uncertain ice sheet albedo, ice sheet dynamics, atmospheric, and oceanic parameters on the ice sheet extent. We find that ice sheet albedo parameters determine the majority of uncertainty when simulating the Last Glacial Maximum North American Ice Sheets. Importantly, different albedo parameters are needed to produce a good match to the Last Glacial Maximum North American Ice Sheets than have previously been used to model the contemporary Greenland Ice Sheet, due to differences in cloud cover over ablation zones. Thus calibrating coupled climate-ice sheet models on one ice sheet may produce strong biases when the model is applied to a new domain. |
format |
Article in Journal/Newspaper |
author |
Gandy, Niall Astfalck, Lachlan Gregoire, Lauren Ivanovic, Ruza Patterson, Violet Sherriff-Tadano, Sam Smith, Robin Williamson, Daniel Rigby, Richard |
spellingShingle |
Gandy, Niall Astfalck, Lachlan Gregoire, Lauren Ivanovic, Ruza Patterson, Violet Sherriff-Tadano, Sam Smith, Robin Williamson, Daniel Rigby, Richard De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum |
author_facet |
Gandy, Niall Astfalck, Lachlan Gregoire, Lauren Ivanovic, Ruza Patterson, Violet Sherriff-Tadano, Sam Smith, Robin Williamson, Daniel Rigby, Richard |
author_sort |
Gandy, Niall |
title |
De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum |
title_short |
De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum |
title_full |
De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum |
title_fullStr |
De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum |
title_full_unstemmed |
De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum |
title_sort |
de-tuning albedo parameters in a coupled climate ice sheet model to simulate the north american ice sheet at the last glacial maximum |
publisher |
American Geophysical Union and Wiley |
publishDate |
2023 |
url |
https://shura.shu.ac.uk/32253/1/Detuning_a_coupled_climate_ice_sheet_model%20%288%29.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
http://shura.shu.ac.uk/32253/ https://shura.shu.ac.uk/32253/1/Detuning_a_coupled_climate_ice_sheet_model%20%288%29.pdf GANDY, Niall, ASTFALCK, Lachlan, GREGOIRE, Lauren, IVANOVIC, Ruza, PATTERSON, Violet, SHERRIFF-TADANO, Sam, SMITH, Robin, WILLIAMSON, Daniel and RIGBY, Richard (2023). De-tuning Albedo Parameters in a coupled Climate Ice Sheet Model to simulate the North American Ice Sheet at the Last Glacial Maximum. Journal of geophysical research. Earth surface. |
op_rights |
arr |
_version_ |
1775351368454766592 |