气候变化领域集成服务门户(CCPortal): Fracture propagation to the base of the Greenland ice sheet during supraglacial lake drainage

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DOI	10.1126/science.1153360
	Fracture propagation to the base of the Greenland ice sheet during supraglacial lake drainage
	Das S.B.; Joughin I.; Behn M.D.; Howat I.M.; King M.A.; Lizarralde D.; Bhatia M.P.
发表日期	2008
ISSN	0036-8075
起始页码	778
结束页码	781
卷号	320 期号:5877
英文摘要	Surface meltwater that reaches the base of an ice sheet creates a mechanism for the rapid response of ice flow to climate change. The process whereby such a pathway is created through thick, cold ice has not, however, been previously observed. We describe the rapid (<2 hours) drainage of a large supraglacial lake down 980 meters through to the bed of the Greenland Ice Sheet initiated by water-driven fracture propagation evolving into moulin flow. Drainage coincided with increased seismicity, transient acceleration, ice-sheet uplift, and horizontal displacement. Subsidence and deceleration occurred over the subsequent 24 hours. The short-lived dynamic response suggests that an efficient drainage system dispersed the meltwater subglacially. The integrated effect of multiple lake drainages could explain the observed net regional summer ice speedup.
英文关键词	ice; surface water; climate change; drainage; fracture propagation; glacial lake; ice flow; ice sheet; lake; meltwater; seismicity; acceleration; article; climate change; deceleration; glacier; Greenland; ice sheet; lake; priority journal; surface water hydrology; water flow; water supply; 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/243461
作者单位	Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Polar Science Center, Applied Physics Lab., University of Washington, 1013 NE 40th Street, Seattle, WA 98105-6698, United States; School of Earth Sciences, Byrd Polar Research Center, Ohio State University, 1090 Carmack Road, Columbus, OH 43210-1002, United States; School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; Department of Geology and Geophysics, Massachusetts Institute of Technology, Woods Hole Oceanographic Institution Joint Program, Woods Hole, MA 02543, United States
推荐引用方式 GB/T 7714	Das S.B.,Joughin I.,Behn M.D.,et al. Fracture propagation to the base of the Greenland ice sheet during supraglacial lake drainage[J],2008,320(5877).
APA	Das S.B..,Joughin I..,Behn M.D..,Howat I.M..,King M.A..,...&Bhatia M.P..(2008).Fracture propagation to the base of the Greenland ice sheet during supraglacial lake drainage.Science,320(5877).
MLA	Das S.B.,et al."Fracture propagation to the base of the Greenland ice sheet during supraglacial lake drainage".Science 320.5877(2008).