气候变化领域集成服务门户(CCPortal): Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming

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DOI	10.1073/pnas.1801769115
	Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming
	Cowton T.R.; Sole A.J.; Nienow P.W.; Slater D.A.; Christoffersen P.
发表日期	2018
ISSN	0027-8424
起始页码	7907
结束页码	7912
卷号	115 期号:31
英文摘要	Predicting the retreat of tidewater outlet glaciers forms a major obstacle to forecasting the rate of mass loss from the Greenland Ice Sheet. This reflects the challenges of modeling the highly dynamic, topographically complex, and data-poor environment of the glacier–fjord systems that link the ice sheet to the ocean. To avoid these difficulties, we investigate the extent to which tidewater glacier retreat can be explained by simple variables: air temperature, meltwater runoff, ocean temperature, and two simple parameterizations of “ocean/atmosphere” forcing based on the combined influence of runoff and ocean temperature. Over a 20-y period at 10 large tidewater outlet glaciers along the east coast of Greenland, we find that ocean/atmosphere forcing can explain up to 76% of the variability in terminus position at individual glaciers and 54% of variation in terminus position across all 10 glaciers. Our findings indicate that (i) the retreat of east Greenland’s tidewater glaciers is best explained as a product of both oceanic and atmospheric warming and (ii) despite the complexity of tidewater glacier behavior, over multiyear timescales a significant proportion of terminus position change can be explained as a simple function of this forcing. These findings thus demonstrate that simple parameterizations can play an important role in predicting the response of the ice sheet to future climate warming. © 2018 National Academy of Sciences. All rights reserved.
英文关键词	Climate change; Glaciers; Greenland; Ice sheets; Sea-level rise
语种	英语
scopus关键词	air temperature; article; atmosphere; climate change; deglaciation; Greenland; ice sheet; runoff; sea level rise; seashore; warming
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/158879
作者单位	Cowton, T.R., School of Geography and Sustainable Development, University of St. Andrews, St. Andrews, KY16 9AL, United Kingdom, School of Geosciences, University of EdinburghEH8 9XP, United Kingdom; Sole, A.J., Department of Geography, University of Sheffield, Sheffield, S10 2TN, United Kingdom; Nienow, P.W., School of Geosciences, University of EdinburghEH8 9XP, United Kingdom; Slater, D.A., Scripps Institute of Oceanography, University of California, San Diego, San Diego, CA 92093, United States; Christoffersen, P., Scott Polar Research Institute, University of Cambridge, Cambridge, CB2 1ER, United Kingdom
推荐引用方式 GB/T 7714	Cowton T.R.,Sole A.J.,Nienow P.W.,等. Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming[J],2018,115(31).
APA	Cowton T.R.,Sole A.J.,Nienow P.W.,Slater D.A.,&Christoffersen P..(2018).Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming.Proceedings of the National Academy of Sciences of the United States of America,115(31).
MLA	Cowton T.R.,et al."Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming".Proceedings of the National Academy of Sciences of the United States of America 115.31(2018).