| Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
| 公開日 |
2006-11-01 |
| タイトル |
|
|
タイトル |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
ice sheet, Heinrich event, instability, surge, model intercomparison |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| ID登録 |
|
|
ID登録 |
10.15094/00003000 |
|
ID登録タイプ |
JaLC |
| ページ属性 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
P(論文) |
| 論文名よみ |
|
|
その他のタイトル |
Simulation of large-scale ice-sheet surges: The ISMIP HEINO experiments |
|
言語 |
en |
| 著者名(英) |
Greve, Ralf
Takahama, Ryoji
Calov, Reinhard
|
| 著者所属(英) |
|
|
言語 |
en |
|
値 |
Institute of Low Temperature Science, Hokkaido University/Graduate School of Environmental Science, Hokkaido University/Potsdam Institute for Climate Impact Research |
| 抄録(英) |
|
|
内容記述タイプ |
Other |
|
内容記述 |
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. |
|
言語 |
en |
| 雑誌書誌ID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA1129795X |
| 書誌情報 |
Polar meteorology and glaciology
巻 20,
p. 1-15,
発行日 2006-11
|
| 出版者 |
|
|
出版者 |
National Institute of Polar Research |
|
言語 |
en |
KJ00004449452 (1.2 MB)
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