Title Initial results of the SeaRISE numerical experiments with the models SICOPOLIS and IcIES for the Greenland ice sheet
Author Greve, R.; Saito, F.; Abe-Ouchi, A.
Author Affil Greve, R., Hokkaido University, Institute of Low Temperature Science, Sapporo, Japan. Other: Japan Agency for Marine-Earth Science and Technology, Japan; University of Tokyo, Japan
Source Annals of Glaciology, 52(58), p.23-30, . Publisher: International Glaciological Society, Cambridge, United Kingdom. ISSN: 0260-3055
Publication Date 2011
Notes In English. 28 refs. GeoRef Acc. No: 310215
Index Terms precipitation (meteorology); climate; climatic change; glacial geology; global change; global warming; ice sheets; mass balance; models; paleoclimatology; simulation; temperature; thermodynamic properties; volume; Greenland--Greenland ice sheet; Arctic region; atmospheric precipitation; climate change; cycles; dynamics; glacial environment; Greenland; Greenland ice sheet; Ice sheet model for Integrated Earth system Studies; IcIES; interglacial environment; latitude; numerical models; sea-level changes; Sea-level Response to Ice Sheet Evolution; SeaRISE; SICOPOLIS; SImulation COde for POLythermal Ice Sheets
Abstract SeaRISE (Sea-level Response to Ice Sheet Evolution) is a US-led multi-model community effort to predict the likely range of the contribution of the Greenland and Antarctic ice sheets to sealevel rise over the next few hundred years under global warming conditions. The Japanese ice-sheet modelling community is contributing to SeaRISE with two large-scale, dynamic/thermodynamic models: SICOPOLIS and IcIES. Here we discuss results for the Greenland ice sheet, obtained using both models under the forcings (surface temperature and precipitation scenarios) defined by the SeaRISE effort. A crucial point for meaningful simulations into the future is to obtain initial conditions that are close to the observed state of the present-day ice sheet. This is achieved by proper tuning during model spin-up from the last glacial/interglacial cycle to today. Experiments over 500 years indicate that both models are more sensitive (exhibit a larger rate of ice-sheet mass loss) to future climate warming (based on the A1B emission scenario) than to a doubling in the basal sliding speed. Ice-sheet mass loss varies between the two models by a factor of ~2 for sliding experiments and a factor of ~3 for climate-warming experiments, highlighting the importance of improved constraints on the parameterization of basal sliding and surface mass balance in ice-sheet models.
URL http://www.igsoc.org/annals/v52/58/a58A067.pdf
Publication Type journal article
Record ID 65007348