气候变化领域集成服务门户(CCPortal): Friction at the bed does not control fast glacier flow

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DOI	10.1126/science.aat2217
	Friction at the bed does not control fast glacier flow
	Stearns L.A.; Van Der Veen C.J.
发表日期	2018
ISSN	0036-8075
起始页码	273
结束页码	277
卷号	361 期号:6399
英文摘要	The largest uncertainty in the ice sheet models used to predict future sea level rise originates from our limited understanding of processes at the ice/bed interface. Near glacier termini, where basal sliding controls ice flow, most predictive ice sheet models use a parameterization of sliding that has been theoretically derived for glacier flow over a hard bed. We find that this sliding relation does not apply to the 140 Greenland glaciers that we analyzed. There is no relationship between basal sliding and frictional stress at the glacier bed, contrary to theoretical predictions. There is a strong relationship between sliding speed and net pressure at the glacier bed. This latter finding is in agreement with earlier observations of mountain glaciers that have been largely overlooked by the glaciological community. © 2017 The Authors, some rights reserved.
英文关键词	friction; glacier flow; hydrological modeling; ice sheet; mountain region; parameterization; sea level change; sliding; uncertainty analysis; Article; buoyancy; environmental parameters; environmental stress; friction; glacial mass balance; glaciation; glacier; glacier bed; Greenland; ice flow; ice sheet; mathematical model; prediction; priority journal; sea level rise; seasonal variation; sliding velocity; velocity; water flow; water pressure; Arctic; Greenland; Greenland Ice Sheet
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245593
作者单位	Department of Geology, University of Kansas, Lawrence, KS 66045, United States; Center for Remote Sensing of Ice Sheets, University of Kansas, Lawrence, KS 66045, United States; University of Kansas, Department of Geography and Atmospheric Science, Lawrence, KS 66045, United States
推荐引用方式 GB/T 7714	Stearns L.A.,Van Der Veen C.J.. Friction at the bed does not control fast glacier flow[J],2018,361(6399).
APA	Stearns L.A.,&Van Der Veen C.J..(2018).Friction at the bed does not control fast glacier flow.Science,361(6399).
MLA	Stearns L.A.,et al."Friction at the bed does not control fast glacier flow".Science 361.6399(2018).