气候变化领域集成服务门户(CCPortal): Modelling the evolution of the Antarctic ice sheet since the last interglacial

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DOI	10.5194/tc-8-1347-2014
	Modelling the evolution of the Antarctic ice sheet since the last interglacial
	Maris M.N.A.; De Boer B.; Ligtenberg S.R.M.; Crucifix M.; Van De Berg W.J.; Oerlemans J.
发表日期	2014
ISSN	19940416
卷号	8 期号:4
英文摘要	We present the effects of changing two sliding parameters, a deformational velocity parameter and two bedrock deflection parameters on the evolution of the Antarctic ice sheet over the period from the last interglacial until the present. These sensitivity experiments have been conducted by running the dynamic ice model ANICE forward in time. The temporal climatological forcing is established by interpolating between two temporal climate states created with a regional climate model. The interpolation is done in such a way that both temperature and surface mass balance follow the European Project for Ice Coring in Antarctica (EPICA) Dome C ice-core proxy record for temperature. We have determined an optimal set of parameter values, for which a realistic grounding-line retreat history and present-day ice sheet can be simulated; the simulation with this set of parameter values is defined as the reference simulation. An increase of sliding with respect to this reference simulation leads to a decrease of the Antarctic ice volume due to enhanced ice velocities on mainly the West Antarctic ice sheet. The effect of changing the deformational velocity parameter mainly yields a change in east Antarctic ice volume. Furthermore, we have found a minimum in the Antarctic ice volume during the mid-Holocene, in accordance with observations. This is a robust feature in our model results, where the strength and the timing of this minimum are both dependent on the investigated parameters. More sliding and a slower responding bedrock lead to a stronger minimum which emerges at an earlier time. From the model results, we conclude that the Antarctic ice sheet has contributed 10.7 ± 1.3 m of eustatic sea level to the global ocean from the last glacial maximum (about 16 ka for the Antarctic ice sheet) until the present. © 2014 Author(s).
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120081
作者单位	Institute for Marine and Atmospheric Research Utrecht, Utrecht University, P.O. Box 80005, 3508 TA Utrecht, Netherlands; Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, Netherlands; Earth and Life Institute (ELI), Georges Lemaître Centre for Earth and Climate Research (TECLIM), Place Louis Pasteur 3, 1348 Louvain-la-Neuve, Belgium
推荐引用方式 GB/T 7714	Maris M.N.A.,De Boer B.,Ligtenberg S.R.M.,et al. Modelling the evolution of the Antarctic ice sheet since the last interglacial[J],2014,8(4).
APA	Maris M.N.A.,De Boer B.,Ligtenberg S.R.M.,Crucifix M.,Van De Berg W.J.,&Oerlemans J..(2014).Modelling the evolution of the Antarctic ice sheet since the last interglacial.Cryosphere,8(4).
MLA	Maris M.N.A.,et al."Modelling the evolution of the Antarctic ice sheet since the last interglacial".Cryosphere 8.4(2014).