DOI: 10.5194/tc-9-1465-2015
Scopus记录号: 2-s2.0-84938818715
论文题名: Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes
作者: Karlsson N ; B ; , Dahl-Jensen D
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 4 起始页码: 1465
结束页码: 1479
语种: 英语
英文关键词: atmospheric forcing
; drainage basin
; glacial hydrology
; ice flow
; long-term change
; observational method
; subglacial environment
; timescale
; water flow
; Arctic
; Greenland
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75267
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Denmark
Recommended Citation:
Karlsson N,B,, Dahl-Jensen D. Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes[J]. Cryosphere,2015-01-01,9(4)