Large-scale instabilities of the Laurentide ice sheet simulated in a fully coupled climate-system model

被引:88
作者
Calov, R
Ganopolski, A
Petoukhov, V
Claussen, M
Greve, R
机构
[1] Potsdam Inst Climate Impact Res, D-14412 Potsdam, Germany
[2] Tech Univ Darmstadt, Dept Mech, D-64289 Darmstadt, Germany
关键词
D O I
10.1029/2002GL016078
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
[1] Heinrich 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-biosphereice 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.
引用
收藏
页码:69 / 1
页数:4
相关论文
共 33 条
[1]   Stochastic resonance in the North Atlantic [J].
Alley, RB ;
Anandakrishnan, S ;
Jung, P .
PALEOCEANOGRAPHY, 2001, 16 (02) :190-198
[2]   Dansgaard-Oeschger events: is there a signal off the Hudson Strait Ice Stream? [J].
Andrews, JT ;
Barber, DC .
QUATERNARY SCIENCE REVIEWS, 2002, 21 (1-3) :443-454
[3]   Hydrological impact of Heinrich events in the subtropical northeast Atlantic [J].
Bard, E ;
Rostek, F ;
Turon, JL ;
Gendreau, S .
SCIENCE, 2000, 289 (5483) :1321-1324
[4]   ICEBERG DISCHARGES INTO THE NORTH-ATLANTIC ON MILLENNIAL TIME SCALES DURING THE LAST GLACIATION [J].
BOND, GC ;
LOTTI, R .
SCIENCE, 1995, 267 (5200) :1005-1010
[5]   Origin of the northern Atlantic's Heinrich events [J].
Broecker, Wallace ;
Bond, Gerard ;
Klas, Mieczyslawa ;
Clark, Elizabeth ;
McManus, Jerry .
CLIMATE DYNAMICS, 1992, 6 (3-4) :265-273
[6]   The thermomechanical response of the Greenland ice sheet to various climate scenarios [J].
Calov, R ;
Hutter, K .
CLIMATE DYNAMICS, 1996, 12 (04) :243-260
[7]  
Calov R, 1998, ANN GLACIOL-SER, V27, P201
[8]  
CALOV R, 2002, UNPUB J GEOPHYS RES
[9]   Sea level changes forced ice breakouts in the Last Glacial cycle: new results from coral terraces [J].
Chappell, J .
QUATERNARY SCIENCE REVIEWS, 2002, 21 (10) :1229-1240
[10]   FAST GLACIER FLOW - ICE STREAMS, SURGING, AND TIDEWATER GLACIERS [J].
CLARKE, GKC .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1987, 92 (B9) :8835-8841