气候变化领域集成服务门户(CCPortal): Seasonal speedup along the western flank of the Greenland ice sheet

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DOI	10.1126/science.1153288
	Seasonal speedup along the western flank of the Greenland ice sheet
	Joughin I.; Das S.B.; King M.A.; Smith B.E.; Howat I.M.; Moon T.
发表日期	2008
ISSN	0036-8075
起始页码	781
结束页码	783
卷号	320 期号:5877
英文摘要	It has been widely hypothesized that a warmer climate in Greenland would increase the volume of lubricating surface meltwater reaching the ice-bedrock interface, accelerating ice flow and increasing mass loss. We have assembled a data set that provides a synoptic-scale view, spanning ice-sheet to outlet-glacier flow, with which to evaluate this hypothesis. On the ice sheet, these data reveal summer speedups (50 to 100%) consistent with, but somewhat larger than, earlier observations. The relative speedup of outlet glaciers, however, is far smaller (<15%). Furthermore, the dominant seasonal influence on Jakobshavn Isbrae's flow is the calving front's annual advance and retreat. With other effects producing outlet-glacier speedups an order of magnitude larger, seasonal melt's influence on ice flow is likely confined to those regions dominated by ice-sheet flow.
英文关键词	surface water; glacier flow; ice flow; ice sheet; meltwater; seasonal variation; article; climate change; glacier; global positioning system; Greenland; ice sheet; pressure; priority journal; seasonal variation; sediment; water flow; 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/244204
作者单位	Polar Science Center, Applied Physics Lab., University of Washington, 1013 NE 40th Street, Seattle, WA 98105-6698, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institute, Woods Hole, MA 02543, United States; School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom; Ohio State University, 1090 Carmack Road, Columbus, OH 43210-1002, United States
推荐引用方式 GB/T 7714	Joughin I.,Das S.B.,King M.A.,et al. Seasonal speedup along the western flank of the Greenland ice sheet[J],2008,320(5877).
APA	Joughin I.,Das S.B.,King M.A.,Smith B.E.,Howat I.M.,&Moon T..(2008).Seasonal speedup along the western flank of the Greenland ice sheet.Science,320(5877).
MLA	Joughin I.,et al."Seasonal speedup along the western flank of the Greenland ice sheet".Science 320.5877(2008).