Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison
Predictions of marine ice-sheet behaviour require models able to simulate grounding-line migration. We present results of an intercomparison experiment for plan-view marine ice-sheet models. Verification is effected by comparison with approximate analytical solutions for flux across the grounding li...
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International Glaciological Society
2013
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Online Access: | http://nora.nerc.ac.uk/id/eprint/502948/ https://nora.nerc.ac.uk/id/eprint/502948/1/Pattyn%20et%20al%202013.pdf https://doi.org/10.3189/2013JoG12J129 |
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ftnerc:oai:nora.nerc.ac.uk:502948 2023-05-15T16:40:17+02:00 Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison Pattyn, Frank Perichon, Laura Durand, Gaël Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C.A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Fürst, Johannes J. Goldberg, Daniel Gudmundsson, G. Hilmar Humbert, Angelika Hütten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rückamp, Martin Rybak, Oleg Seroussi, Hélène Thoma, Malte Wilkens, Nina 2013-07 text http://nora.nerc.ac.uk/id/eprint/502948/ https://nora.nerc.ac.uk/id/eprint/502948/1/Pattyn%20et%20al%202013.pdf https://doi.org/10.3189/2013JoG12J129 en eng International Glaciological Society https://nora.nerc.ac.uk/id/eprint/502948/1/Pattyn%20et%20al%202013.pdf Pattyn, Frank; Perichon, Laura; Durand, Gaël; Favier, Lionel; Gagliardini, Olivier; Hindmarsh, Richard C.A. orcid:0000-0003-1633-2416 Zwinger, Thomas; Albrecht, Torsten; Cornford, Stephen; Docquier, David; Fürst, Johannes J.; Goldberg, Daniel; Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 Humbert, Angelika; Hütten, Moritz; Huybrechts, Philippe; Jouvet, Guillaume; Kleiner, Thomas; Larour, Eric; Martin, Daniel; Morlighem, Mathieu; Payne, Anthony J.; Pollard, David; Rückamp, Martin; Rybak, Oleg; Seroussi, Hélène; Thoma, Malte; Wilkens, Nina. 2013 Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison. Journal of Glaciology, 59 (215). 410-422. https://doi.org/10.3189/2013JoG12J129 <https://doi.org/10.3189/2013JoG12J129> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.3189/2013JoG12J129 2023-02-04T19:37:34Z Predictions of marine ice-sheet behaviour require models able to simulate grounding-line migration. We present results of an intercomparison experiment for plan-view marine ice-sheet models. Verification is effected by comparison with approximate analytical solutions for flux across the grounding line using simplified geometrical configurations (no lateral variations, no buttressing effects from lateral drag). Perturbation experiments specifying spatial variation in basal sliding parameters permitted the evolution of curved grounding lines, generating buttressing effects. The experiments showed regions of compression and extensional flow across the grounding line, thereby invalidating the boundary layer theory. Steady-state grounding-line positions were found to be dependent on the level of physical model approximation. Resolving grounding lines requires inclusion of membrane stresses, a sufficiently small grid size (<500 m), or subgrid interpolation of the grounding line. The latter still requires nominal grid sizes of <5 km. For larger grid spacings, appropriate parameterizations for ice flux may be imposed at the grounding line, but the short-time transient behaviour is then incorrect and different from models that do not incorporate grounding-line parameterizations. The numerical error associated with predicting grounding-line motion can be reduced significantly below the errors associated with parameter ignorance and uncertainties in future scenarios. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Natural Environment Research Council: NERC Open Research Archive Journal of Glaciology 59 215 410 422 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Predictions of marine ice-sheet behaviour require models able to simulate grounding-line migration. We present results of an intercomparison experiment for plan-view marine ice-sheet models. Verification is effected by comparison with approximate analytical solutions for flux across the grounding line using simplified geometrical configurations (no lateral variations, no buttressing effects from lateral drag). Perturbation experiments specifying spatial variation in basal sliding parameters permitted the evolution of curved grounding lines, generating buttressing effects. The experiments showed regions of compression and extensional flow across the grounding line, thereby invalidating the boundary layer theory. Steady-state grounding-line positions were found to be dependent on the level of physical model approximation. Resolving grounding lines requires inclusion of membrane stresses, a sufficiently small grid size (<500 m), or subgrid interpolation of the grounding line. The latter still requires nominal grid sizes of <5 km. For larger grid spacings, appropriate parameterizations for ice flux may be imposed at the grounding line, but the short-time transient behaviour is then incorrect and different from models that do not incorporate grounding-line parameterizations. The numerical error associated with predicting grounding-line motion can be reduced significantly below the errors associated with parameter ignorance and uncertainties in future scenarios. |
format |
Article in Journal/Newspaper |
author |
Pattyn, Frank Perichon, Laura Durand, Gaël Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C.A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Fürst, Johannes J. Goldberg, Daniel Gudmundsson, G. Hilmar Humbert, Angelika Hütten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rückamp, Martin Rybak, Oleg Seroussi, Hélène Thoma, Malte Wilkens, Nina |
spellingShingle |
Pattyn, Frank Perichon, Laura Durand, Gaël Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C.A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Fürst, Johannes J. Goldberg, Daniel Gudmundsson, G. Hilmar Humbert, Angelika Hütten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rückamp, Martin Rybak, Oleg Seroussi, Hélène Thoma, Malte Wilkens, Nina Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
author_facet |
Pattyn, Frank Perichon, Laura Durand, Gaël Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C.A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Fürst, Johannes J. Goldberg, Daniel Gudmundsson, G. Hilmar Humbert, Angelika Hütten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rückamp, Martin Rybak, Oleg Seroussi, Hélène Thoma, Malte Wilkens, Nina |
author_sort |
Pattyn, Frank |
title |
Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
title_short |
Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
title_full |
Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
title_fullStr |
Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
title_full_unstemmed |
Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
title_sort |
grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea mismip3d intercomparison |
publisher |
International Glaciological Society |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/502948/ https://nora.nerc.ac.uk/id/eprint/502948/1/Pattyn%20et%20al%202013.pdf https://doi.org/10.3189/2013JoG12J129 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_relation |
https://nora.nerc.ac.uk/id/eprint/502948/1/Pattyn%20et%20al%202013.pdf Pattyn, Frank; Perichon, Laura; Durand, Gaël; Favier, Lionel; Gagliardini, Olivier; Hindmarsh, Richard C.A. orcid:0000-0003-1633-2416 Zwinger, Thomas; Albrecht, Torsten; Cornford, Stephen; Docquier, David; Fürst, Johannes J.; Goldberg, Daniel; Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 Humbert, Angelika; Hütten, Moritz; Huybrechts, Philippe; Jouvet, Guillaume; Kleiner, Thomas; Larour, Eric; Martin, Daniel; Morlighem, Mathieu; Payne, Anthony J.; Pollard, David; Rückamp, Martin; Rybak, Oleg; Seroussi, Hélène; Thoma, Malte; Wilkens, Nina. 2013 Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison. Journal of Glaciology, 59 (215). 410-422. https://doi.org/10.3189/2013JoG12J129 <https://doi.org/10.3189/2013JoG12J129> |
op_doi |
https://doi.org/10.3189/2013JoG12J129 |
container_title |
Journal of Glaciology |
container_volume |
59 |
container_issue |
215 |
container_start_page |
410 |
op_container_end_page |
422 |
_version_ |
1766030675516850176 |