Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments
The three-dimensional, dynamic/thermodynamic ice-sheet model SICOPOLIS (SImulation COde for POLythermal Ice Sheets) is applied to the ISMIP HEINO (Ice Sheet Model Intercomparison Project-Heinrich Event INtercOmparison) set-up. ISMIP HEINO has been designed to study large-scale ice-sheet instabilitie...
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Institute of Low Temperature Science, Hokkaido University/Graduate School of Environmental Science, Hokkaido University/Potsdam Institute for Climate Impact Research
2006
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ftnipr:oai:nipr.repo.nii.ac.jp:00003000 2023-05-15T16:35:21+02:00 Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments Greve,Ralf Takahama,Ryoji Calov,Reinhard 2006-11 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3000 http://id.nii.ac.jp/1291/00003000/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3000&item_no=1&attribute_id=18&file_no=1 en eng Institute of Low Temperature Science, Hokkaido University/Graduate School of Environmental Science, Hokkaido University/Potsdam Institute for Climate Impact Research National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3000 http://id.nii.ac.jp/1291/00003000/ AA1129795X Polar meteorology and glaciology, 20, 1-15(2006-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3000&item_no=1&attribute_id=18&file_no=1 ice sheet Heinrich event instability surge model intercomparison Departmental Bulletin Paper P(論文) 2006 ftnipr 2022-11-26T19:42:23Z The three-dimensional, dynamic/thermodynamic ice-sheet model SICOPOLIS (SImulation COde for POLythermal Ice Sheets) is applied to the ISMIP HEINO (Ice Sheet Model Intercomparison Project-Heinrich Event INtercOmparison) set-up. ISMIP HEINO has been designed to study large-scale ice-sheet instabilities, similar to those of the Laurentide ice sheet which are likely the cause of Heinrich events, on a simplified geometry which consists of a flat square with 4000 km side length. This square contains an area which resembles Hudson Bay and Hudson Strait, on which rapid sediment sliding can occur. The ice sheet is built up over 200 ka by assuming a temporally constant glacial climate. For the standard set-up of ISMIP HEINO, we obtain an oscillatory behaviour of the ice sheet with a main period of approx. 7.5 ka. One cycle consists of a gradual growth phase, followed by a massive surge through "Hudson Bay" and "Hudson Strait" owing to rapid sediment sliding on a molten bed. The occurrence of internal oscillations is robust against moderate variations of the surface boundary conditions and the strength of the sediment sliding. These findings support the idea of a free oscillatory mechanism as the main cause for large-scale ice-sheet surges. Report Hudson Bay Hudson Strait Ice Sheet Polar meteorology and glaciology National Institute of Polar Research Repository, Japan Hudson Bay Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
ice sheet Heinrich event instability surge model intercomparison |
spellingShingle |
ice sheet Heinrich event instability surge model intercomparison Greve,Ralf Takahama,Ryoji Calov,Reinhard Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
topic_facet |
ice sheet Heinrich event instability surge model intercomparison |
description |
The three-dimensional, dynamic/thermodynamic ice-sheet model SICOPOLIS (SImulation COde for POLythermal Ice Sheets) is applied to the ISMIP HEINO (Ice Sheet Model Intercomparison Project-Heinrich Event INtercOmparison) set-up. ISMIP HEINO has been designed to study large-scale ice-sheet instabilities, similar to those of the Laurentide ice sheet which are likely the cause of Heinrich events, on a simplified geometry which consists of a flat square with 4000 km side length. This square contains an area which resembles Hudson Bay and Hudson Strait, on which rapid sediment sliding can occur. The ice sheet is built up over 200 ka by assuming a temporally constant glacial climate. For the standard set-up of ISMIP HEINO, we obtain an oscillatory behaviour of the ice sheet with a main period of approx. 7.5 ka. One cycle consists of a gradual growth phase, followed by a massive surge through "Hudson Bay" and "Hudson Strait" owing to rapid sediment sliding on a molten bed. The occurrence of internal oscillations is robust against moderate variations of the surface boundary conditions and the strength of the sediment sliding. These findings support the idea of a free oscillatory mechanism as the main cause for large-scale ice-sheet surges. |
format |
Report |
author |
Greve,Ralf Takahama,Ryoji Calov,Reinhard |
author_facet |
Greve,Ralf Takahama,Ryoji Calov,Reinhard |
author_sort |
Greve,Ralf |
title |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
title_short |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
title_full |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
title_fullStr |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
title_full_unstemmed |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
title_sort |
simulation of large-scale ice-sheet surges: the ismip heino experiments |
publisher |
Institute of Low Temperature Science, Hokkaido University/Graduate School of Environmental Science, Hokkaido University/Potsdam Institute for Climate Impact Research |
publishDate |
2006 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3000 http://id.nii.ac.jp/1291/00003000/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3000&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Hudson Bay Hudson Hudson Strait |
geographic_facet |
Hudson Bay Hudson Hudson Strait |
genre |
Hudson Bay Hudson Strait Ice Sheet Polar meteorology and glaciology |
genre_facet |
Hudson Bay Hudson Strait Ice Sheet Polar meteorology and glaciology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3000 http://id.nii.ac.jp/1291/00003000/ AA1129795X Polar meteorology and glaciology, 20, 1-15(2006-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3000&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766025580680052736 |