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 is well constrained empirically but has 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 p...
Published in: | Journal of Geophysical Research: Earth Surface |
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American Geophysical Union (AGU)
2023
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Online Access: | https://centaur.reading.ac.uk/113190/ https://centaur.reading.ac.uk/113190/1/JGR%20Earth%20Surface%20-%202023%20-%20Gandy.pdf |
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ftunivreading:oai:centaur.reading.ac.uk:113190 2024-06-23T07:53:22+00:00 De‐Tuning Albedo parameters in a coupled climate ice sheet model to simulate the North American ice sheet at the last glacial maximum Gandy, N. Astfalck, L. C. Gregoire, L. J. Ivanovic, R. F. Patterson, V. L. Sherriff‐Tadano, S. Smith, R. S. Williamson, D. Rigby, R. 2023-08 text https://centaur.reading.ac.uk/113190/ https://centaur.reading.ac.uk/113190/1/JGR%20Earth%20Surface%20-%202023%20-%20Gandy.pdf en eng American Geophysical Union (AGU) https://centaur.reading.ac.uk/113190/1/JGR%20Earth%20Surface%20-%202023%20-%20Gandy.pdf Gandy, N. orcid:0000-0003-4848-4203 , Astfalck, L. C., Gregoire, L. J. orcid:0000-0003-0258-7282 , Ivanovic, R. F. orcid:0000-0002-7805-6018 , Patterson, V. L. orcid:0000-0001-5763-1848 , Sherriff‐Tadano, S., Smith, R. S. <https://centaur.reading.ac.uk/view/creators/90000556.html> orcid:0000-0001-7479-7778 , Williamson, D. and Rigby, R. orcid:0000-0001-9554-6054 (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, 128 (8). e2023JF007250. ISSN 2169-9011 doi: https://doi.org/10.1029/2023jf007250 <https://doi.org/10.1029/2023jf007250> cc_by_4 Article PeerReviewed 2023 ftunivreading https://doi.org/10.1029/2023jf007250 2024-06-11T15:12:32Z The Last Glacial Maximum extent of the North American Ice Sheets is well constrained empirically but has 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 CentAUR: Central Archive at the University of Reading Greenland Journal of Geophysical Research: Earth Surface 128 8 |
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Open Polar |
collection |
CentAUR: Central Archive at the University of Reading |
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ftunivreading |
language |
English |
description |
The Last Glacial Maximum extent of the North American Ice Sheets is well constrained empirically but has 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, N. Astfalck, L. C. Gregoire, L. J. Ivanovic, R. F. Patterson, V. L. Sherriff‐Tadano, S. Smith, R. S. Williamson, D. Rigby, R. |
spellingShingle |
Gandy, N. Astfalck, L. C. Gregoire, L. J. Ivanovic, R. F. Patterson, V. L. Sherriff‐Tadano, S. Smith, R. S. Williamson, D. Rigby, R. 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, N. Astfalck, L. C. Gregoire, L. J. Ivanovic, R. F. Patterson, V. L. Sherriff‐Tadano, S. Smith, R. S. Williamson, D. Rigby, R. |
author_sort |
Gandy, N. |
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 (AGU) |
publishDate |
2023 |
url |
https://centaur.reading.ac.uk/113190/ https://centaur.reading.ac.uk/113190/1/JGR%20Earth%20Surface%20-%202023%20-%20Gandy.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://centaur.reading.ac.uk/113190/1/JGR%20Earth%20Surface%20-%202023%20-%20Gandy.pdf Gandy, N. orcid:0000-0003-4848-4203 , Astfalck, L. C., Gregoire, L. J. orcid:0000-0003-0258-7282 , Ivanovic, R. F. orcid:0000-0002-7805-6018 , Patterson, V. L. orcid:0000-0001-5763-1848 , Sherriff‐Tadano, S., Smith, R. S. <https://centaur.reading.ac.uk/view/creators/90000556.html> orcid:0000-0001-7479-7778 , Williamson, D. and Rigby, R. orcid:0000-0001-9554-6054 (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, 128 (8). e2023JF007250. ISSN 2169-9011 doi: https://doi.org/10.1029/2023jf007250 <https://doi.org/10.1029/2023jf007250> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1029/2023jf007250 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
128 |
container_issue |
8 |
_version_ |
1802644979168837632 |