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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Online Access: | https://publishup.uni-potsdam.de/frontdoor/index/index/docId/35339 https://doi.org/10.3189/2013JoG12J129 |
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:35339 2023-12-03T10:24:19+01:00 Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison Pattyn, Frank Perichon, Laura Durand, Gael Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C. A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Furst, Johannes J. Goldberg, Daniel Gudmundsson, Gudmundur Hilmar Humbert, Angelika Huetten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rueckamp, Martin Rybak, Oleg Seroussi, Helene Thoma, Malte Wilkens, Nina 2013 https://publishup.uni-potsdam.de/frontdoor/index/index/docId/35339 https://doi.org/10.3189/2013JoG12J129 eng eng https://publishup.uni-potsdam.de/frontdoor/index/index/docId/35339 https://doi.org/10.3189/2013JoG12J129 info:eu-repo/semantics/closedAccess Institut für Physik und Astronomie article doc-type:article 2013 ftubpotsdam https://doi.org/10.3189/2013JoG12J129 2023-11-05T23:35:04Z 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 University of Potsdam: publish.UP Journal of Glaciology 59 215 410 422 |
institution |
Open Polar |
collection |
University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
Institut für Physik und Astronomie |
spellingShingle |
Institut für Physik und Astronomie Pattyn, Frank Perichon, Laura Durand, Gael Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C. A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Furst, Johannes J. Goldberg, Daniel Gudmundsson, Gudmundur Hilmar Humbert, Angelika Huetten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rueckamp, Martin Rybak, Oleg Seroussi, Helene Thoma, Malte Wilkens, Nina Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison |
topic_facet |
Institut für Physik und Astronomie |
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, Gael Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C. A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Furst, Johannes J. Goldberg, Daniel Gudmundsson, Gudmundur Hilmar Humbert, Angelika Huetten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rueckamp, Martin Rybak, Oleg Seroussi, Helene Thoma, Malte Wilkens, Nina |
author_facet |
Pattyn, Frank Perichon, Laura Durand, Gael Favier, Lionel Gagliardini, Olivier Hindmarsh, Richard C. A. Zwinger, Thomas Albrecht, Torsten Cornford, Stephen Docquier, David Furst, Johannes J. Goldberg, Daniel Gudmundsson, Gudmundur Hilmar Humbert, Angelika Huetten, Moritz Huybrechts, Philippe Jouvet, Guillaume Kleiner, Thomas Larour, Eric Martin, Daniel Morlighem, Mathieu Payne, Anthony J. Pollard, David Rueckamp, Martin Rybak, Oleg Seroussi, Helene 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 |
publishDate |
2013 |
url |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/35339 https://doi.org/10.3189/2013JoG12J129 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/35339 https://doi.org/10.3189/2013JoG12J129 |
op_rights |
info:eu-repo/semantics/closedAccess |
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_ |
1784272708591157248 |