气候变化领域集成服务门户(CCPortal): Enhanced basal lubrication and the contribution of the Greenland ice sheet to future sea-level rise

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DOI	10.1073/pnas.1212647110
	Enhanced basal lubrication and the contribution of the Greenland ice sheet to future sea-level rise
	Shannon S.R.; Payne A.J.; Bartholomew I.D.; Van Den Broeke M.R.; Edwards T.L.; Fettweis X.; Gagliardini O.; Gillet-Chaulet F.; Goelzer H.; Hoffman M.J.; Huybrechts P.; Mair D.W.F.; Nienow P.W.; Perego M.; Price S.F.; Paul Smeets C.J.P.; Sole A.J.; Van De Wal R.S.W.; Zwinger T.
发表日期	2013
ISSN	0027-8424
起始页码	14156
结束页码	14161
卷号	110 期号:35
英文摘要	We assess the effect of enhanced basal sliding on the flow and mass budget of the Greenland ice sheet, using a newly developed parameterization of the relation between meltwater runoff and ice flow. A wide range of observations suggest that water generated by melt at the surface of the ice sheet reaches its bed by both fracture and drainage through moulins. Once at the bed, this water is likely to affect lubrication, although current observations are insufficient to determine whether changes in subglacial hydraulics will limit the potential for the speedup of flow. An uncertainty analysis based on our best-fit parameterization admits both possibilities: continuously increasing or bounded lubrication. We apply the parameterization to four higher-order ice-sheet models in a series of experiments forced by changes in both lubrication and surface mass budget and determine the additional mass loss brought about by lubrication in comparison with experiments forced only by changes in surface mass balance. We use forcing from a regional climate model, itself forced by output from the European Centre Hamburg Model (ECHAM5) global climate model run under scenario A1B. Although changes in lubrication generate widespread effects on the flow and form of the ice sheet, they do not affect substantial net mass loss; increase in the ice sheet's contribution to sea-level rise from basal lubrication is projected by all models to be no more than 5% of the contribution from surface mass budget forcing alone.
语种	英语
scopus关键词	runoff; article; comparative study; controlled study; environmental parameters; experimental model; flow kinetics; global climate; Greenland; ice sheet; lubrication; mass; priority journal; sea level rise; surface property
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158928
作者单位	Shannon, S.R., Department of Geographical Science, University of Bristol, Bristol BS8 1SS, United Kingdom; Payne, A.J., Department of Geographical Science, University of Bristol, Bristol BS8 1SS, United Kingdom; Bartholomew, I.D., School of Geosciences, University of Edinburgh, Edinburgh EH8 9XP, United Kingdom; Van Den Broeke, M.R., Institute for Marine, Atmospheric Research Utrecht, Utrecht University, 3508, TA Utrecht, Netherlands; Edwards, T.L., Department of Geographical Science, University of Bristol, Bristol BS8 1SS, United Kingdom; Fettweis, X., Department of Geography 2, University of Liège, Bat. B11, 4000 Liège, Belgium; Gagliardini, O., Laboratoire de Glaciologie et Géophysique de l'Environnement, Université Joseph Fourier-Grenoble, UMR 5183, Saint-Martin-d'Hères, France, Institut Universitaire de France, 75005 Paris, France; Gillet-Chaulet, F., Laboratoire de Glaciologie et Géophysique de l'Environnement, Université Joseph Fourier-Grenoble, UMR 5183, Saint-Martin-d'Hères, France; Goelzer, H., ...
推荐引用方式 GB/T 7714	Shannon S.R.,Payne A.J.,Bartholomew I.D.,et al. Enhanced basal lubrication and the contribution of the Greenland ice sheet to future sea-level rise[J],2013,110(35).
APA	Shannon S.R..,Payne A.J..,Bartholomew I.D..,Van Den Broeke M.R..,Edwards T.L..,...&Zwinger T..(2013).Enhanced basal lubrication and the contribution of the Greenland ice sheet to future sea-level rise.Proceedings of the National Academy of Sciences of the United States of America,110(35).
MLA	Shannon S.R.,et al."Enhanced basal lubrication and the contribution of the Greenland ice sheet to future sea-level rise".Proceedings of the National Academy of Sciences of the United States of America 110.35(2013).