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Sensitivity experiments for the Antarctic ice sheet with varied sub-ice-shelf melting rates
| Title: | Sensitivity experiments for the Antarctic ice sheet with varied sub-ice-shelf melting rates |
| Authors: | Sato, Tatsuru Browse this author | | Greve, Ralf Browse this author →KAKEN DB |
| Issue Date: | Nov-2012 |
| Publisher: | International Glaciological Societ |
| Journal Title: | Annals of Glaciology |
| Volume: | 53 |
| Issue: | 60 |
| Start Page: | 221 |
| End Page: | 228 |
| Publisher DOI: | 10.3189/2012AoG60A042 |
| Abstract: | Ice-sheet modelling is an important tool for predicting the possible response of ice sheets to climate change in the past and future. An established ice-sheet model is SICOPOLIS (Simulation COde for POLythermal Ice Sheets), and for this study the previously grounded-ice-only model was complemented by an ice-shelf module. The new version of SICOPOLIS is applied to the Antarctic ice sheet, driven by standard forcings defined by the SeaRISE (Sea-level Response to Ice Sheet Evolution) community effort. A crucial point for simulations into the future is to obtain reasonable initial conditions by a palaeoclimatic spin-up, which we carry out over 125 000 years from the Eemian until today. We then carry out a set of experiments for 500 years into the future, in which the surface temperature and precipitation are kept at their present-day distributions, while sub-ice-shelf melting rates between 0 and 200 m a(-1) are applied. These simulations show a significant, but not catastrophic, sensitivity of the ice sheet. Grounded-ice volumes decrease with increasing melting rates, and the spread of the results from the zero to the maximum melting case is similar to 0.65 m s.l.e. (metres sea-level equivalent) after 100 years and similar to 2.25 m s.l.e. after 500 years. |
| Rights: | © 2012 International Glaciological Society |
| Relation: | http://www.igsoc.org/annals/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/52824 |
| 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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Submitter: Greve Ralf
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