2024-03-29T04:42:00Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/346532022-11-17T02:08:08Zhdl_2115_20056hdl_2115_147Large-scale instabilities of the Laurentide ice sheet simulated in a fully coupled climate-system modelCalov, ReinhardGanopolski, AndreyPetoukhov, VladimirClaussen, MartinGreve, RalfGlaciologyClimate dynamicsPaleoclimatologyHeinrich eventSurge452Heinrich events, related to large-scale surges of the Laurentide ice sheet, represent one of the most dramatic types of abrupt climate change occurring during the last glacial. Here, using a coupled atmosphere-ocean-biosphere-ice sheet model, we simulate quasi-periodic large-scale surges from the Laurentide ice sheet. The average time between simulated events is about 7,000 yrs, while the surging phase of each event lasts only several hundred years, with a total ice volume discharge corresponding to 5-10 m of sea level rise. In our model the simulated ice surges represent internal oscillations of the ice sheet. At the same time, our results suggest the possibility of a synchronization between instabilities of different ice sheets, as indicated in paleoclimate records.American Geophysical UnionJournal Articleapplication/pdfhttp://hdl.handle.net/2115/34653https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/34653/1/Calov_etal_2002_GRL.pdf0094-8276Geophysical Research Letters292422162002-12-27enginfo:doi/10.1029/2002GL016078An edited version of this paper was published by AGU. Copyright 2002 American Geophysical Union.author