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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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/29659 2023-05-15T16:35:21+02:00 Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments Greve, Ralf Takahama, Ryoji Calov, Reinhard http://hdl.handle.net/2115/29659 eng eng National Institute of Polar Research http://ci.nii.ac.jp/naid/110005328005 http://hdl.handle.net/2115/29659 Polar meteorology and glaciology, 20: 1-15 国立極地研究所. 本文データは国立極地研究所の許諾に基づきCiNiiから複製したものである. ice sheet Heinrich event instability surge model intercomparison 452.96 article fthokunivhus 2022-11-18T01:01:32Z 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. Article in Journal/Newspaper Hudson Bay Hudson Strait Ice Sheet Polar meteorology and glaciology Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Hudson Hudson Bay Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
ice sheet Heinrich event instability surge model intercomparison 452.96 |
spellingShingle |
ice sheet Heinrich event instability surge model intercomparison 452.96 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 452.96 |
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 |
Article in Journal/Newspaper |
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 |
National Institute of Polar Research |
url |
http://hdl.handle.net/2115/29659 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Hudson Hudson Bay Hudson Strait |
geographic_facet |
Hudson Hudson Bay 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 |
http://ci.nii.ac.jp/naid/110005328005 http://hdl.handle.net/2115/29659 Polar meteorology and glaciology, 20: 1-15 |
op_rights |
国立極地研究所. 本文データは国立極地研究所の許諾に基づきCiNiiから複製したものである. |
_version_ |
1766025580861456384 |