气候变化领域集成服务门户(CCPortal): Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes

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DOI	10.5194/tc-9-1465-2015
	Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes
	Karlsson N.B.; Dahl-Jensen D.
发表日期	2015
ISSN	19940416
卷号	9 期号:4
英文摘要	The influence of subglacial water on the dynamics of ice flow has been the object of increasing interest in the past decade. In this study we focus on large-scale, long-term changes in surface elevation over Northeast Greenland and the corresponding changes in subglacial water routeways. Our results show that over timescales ranging from decades to millennia the area may experience redistribution of and fluctuation in subglacial water outflux under the main glacier outlets. The fluctuations in subglacial water routing occur even in the absence of external forcing. Based on these results we conclude that changes in the subglacial water routeways are an intrinsic part of the drainage basin dynamics, where the subglacial system is likely always in a transient state. The results also imply that fluctuations at the margins observed at present might originate from changes several hundred kilometres upstream. Since surface elevation changes may propagate upstream over timescales much longer than the observational period, the cause of the fluctuations may not be present in current observational records. © 2015. CC Attribution 3.0 License.
学科领域	atmospheric forcing; drainage basin; glacial hydrology; ice flow; long-term change; observational method; subglacial environment; timescale; water flow; Arctic; Greenland
语种	英语
scopus关键词	atmospheric forcing; drainage basin; glacial hydrology; ice flow; long-term change; observational method; subglacial environment; timescale; water flow; Arctic; Greenland
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119846
作者单位	Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Denmark
推荐引用方式 GB/T 7714	Karlsson N.B.,Dahl-Jensen D.. Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes[J],2015,9(4).
APA	Karlsson N.B.,&Dahl-Jensen D..(2015).Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes.Cryosphere,9(4).
MLA	Karlsson N.B.,et al."Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes".Cryosphere 9.4(2015).