气候变化领域集成服务门户(CCPortal): Uppermost crustal structure regulates the flow of the Greenland Ice Sheet

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DOI	10.1038/s41467-021-27537-5
	Uppermost crustal structure regulates the flow of the Greenland Ice Sheet
	Jones G.A.; Ferreira A.M.G.; Kulessa B.; Schimmel M.; Berbellini A.; Morelli A.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The flow of the Greenland Ice Sheet is controlled by subglacial processes and conditions that depend on the geological provenance and temperature of the crust beneath it, neither of which are adequately known. Here we present a seismic velocity model of the uppermost 5 km of the Greenlandic crust. We show that slow velocities in the upper crust tend to be associated with major outlet glaciers along the ice-sheet margin, and elevated geothermal heat flux along the Iceland hotspot track inland. Outlet glaciers particularly susceptible to basal slip over deformable subglacial sediments include Jakobshavn, Helheim and Kangerdlussuaq, while geothermal warming and softening of basal ice may affect the onset of faster ice flow at Petermann Glacier and the Northeast Greenland Ice Stream. Interactions with the solid earth therefore control the past, present and future dynamics of the Greenland Ice Sheet and must be adequately explored and implemented in ice sheet models. © 2021, The Author(s).
语种	英语
scopus关键词	heat flux; ice flow; provenance; seismic velocity; upper crust; article; glacier; Greenland; heat; ice sheet; Iceland; sediment; stream (river); velocity; warming; Arctic; Greenland; Greenland Ice Sheet; Iceland; Petermann Glacier
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250549
作者单位	Department of Geography, Swansea University, Singleton Park, Swansea, United Kingdom; Department of Earth Sciences, University College London, London, United Kingdom; CERIS, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; University of Tasmania, Hobart, TAS, Australia; Geosciences Barcelona (GEO3BCN-CSIC), Barcelona, Spain; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
推荐引用方式 GB/T 7714	Jones G.A.,Ferreira A.M.G.,Kulessa B.,et al. Uppermost crustal structure regulates the flow of the Greenland Ice Sheet[J],2021,12(1).
APA	Jones G.A.,Ferreira A.M.G.,Kulessa B.,Schimmel M.,Berbellini A.,&Morelli A..(2021).Uppermost crustal structure regulates the flow of the Greenland Ice Sheet.Nature Communications,12(1).
MLA	Jones G.A.,et al."Uppermost crustal structure regulates the flow of the Greenland Ice Sheet".Nature Communications 12.1(2021).