| Title: | Results from the Ice-Sheet Model Intercomparison Project–Heinrich Event INtercOmparison (ISMIP HEINO) |
| Authors: | Calov, Reinhard Browse this author |
| Greve, Ralf Browse this author →KAKEN DB |
| Abe-Ouchi, Ayako Browse this author |
| Bueler, Ed Browse this author |
| Huybrechts, Philippe Browse this author |
| Johnson, Jesse V. Browse this author |
| Pattyn, Frank Browse this author |
| Pollard, David Browse this author |
| Ritz, Catherine Browse this author |
| Saito, Fuyuki Browse this author |
| Tarasov, Lev Browse this author |
| Keywords: | Ice sheet |
| Model intercomparison |
| ISMIP |
| Heinrich event |
| Instability |
| Issue Date: | 1-Aug-2010 |
| Publisher: | International Glaciological Society |
| Journal Title: | Journal of Glaciology |
| Volume: | 56 |
| Issue: | 197 |
| Start Page: | 371 |
| End Page: | 383 |
| Publisher DOI: | 10.3189/002214310792447789 |
| Abstract: | Results from the Heinrich Event INtercOmparison (HEINO) topic of the Ice-Sheet Model Intercomparison Project (ISMIP) are presented. ISMIP HEINO was designed to explore internal largescale ice-sheet instabilities in different contemporary ice-sheet models. These instabilities are of interest because they are a possible cause of Heinrich events. A simplified geometry experiment reproduces the main characteristics of the Laurentide ice sheet, including the sedimented region over Hudson Bay and Hudson Strait. The model experiments include a standard run plus seven variations. Nine dynamic/thermodynamic ice-sheet models were investigated; one of these models contains a combination of the shallow-shelf (SSA) and shallow-ice approximation (SIA), while the remaining eight models are of SIA type only. Seven models, including the SIA–SSA model, exhibit oscillatory surges with a period of ∼1000 years for a broad range of parameters, while two models remain in a permanent state of streaming for most parameter settings. In a number of models, the oscillations disappear for high surface temperatures, strong snowfall and small sediment sliding parameters. In turn, low surface temperatures and low snowfall are favourable for the ice-surge cycles. We conclude that further improvement of ice-sheet models is crucial for adequate, robust simulations of cyclic large-scale instabilities. |
| Rights: | © 2010 International Glaciological Society |
| Relation: | http://www.igsoc.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/44808 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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