globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1801769115
论文题名:
Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming
作者: Cowton T.R.; Sole A.J.; Nienow P.W.; Slater D.A.; Christoffersen P.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2018
卷: 115, 期:31
起始页码: 7907
结束页码: 7912
语种: 英语
英文关键词: Climate change ; Glaciers ; Greenland ; Ice sheets ; Sea-level rise
Scopus关键词: air temperature ; article ; atmosphere ; climate change ; deglaciation ; Greenland ; ice sheet ; runoff ; sea level rise ; seashore ; warming
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162295
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Cowton T.R.,Sole A.J.,Nienow P.W.,et al. Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming[J]. Proceedings of the National Academy of Sciences of the United States of America,2018-01-01,115(31)
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