DOI: 10.1002/2015GL065393
论文题名: Subglacial water drainage, storage, and piracy beneath the Greenland ice sheet
作者: Lindbäck K. ; Pettersson R. ; Hubbard A.L. ; Doyle S.H. ; Van As D. ; Mikkelsen A.B. ; Fitzpatrick A.A.
刊名: Geophysical Research Letters
ISSN: 0094-9404
EISSN: 1944-9135
出版年: 2015
卷: 42, 期: 18 起始页码: 7606
结束页码: 7614
语种: 英语
英文关键词: Greenland ice sheet
; ice sheet dynamics
; ice sheet hydrology
Scopus关键词: Atmospheric temperature
; Catchments
; Glaciers
; Greenland Ice Sheet
; Hydrological analysis
; Ice sheet
; Ice sheet dynamics
; Measurements and modeling
; Surface elevation changes
; Surface temperatures
; Transient behavior
; Ice
; catchment
; discharge
; drainage
; glacial hydrology
; measurement method
; meltwater
; numerical model
; proglacial environment
; radar
; subglacial environment
; surface temperature
; water storage
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Meltwater drainage across the surface of the Greenland ice sheet (GrIS) is well constrained by measurements and modeling, yet despite its critical role, knowledge of its transit through the subglacial environment remains limited. Here we present a subglacial hydrological analysis of a land-terminating sector of the GrIS at unprecedented resolution that predicts the routing of surface-derived meltwater once it has entered the basal drainage system. Our analysis indicates the probable existence of small subglacial lakes that remain undetectable by methods using surface elevation change or radar techniques. Furthermore, the analysis suggests transient behavior with rapid switching of subglacial drainage between competing catchments driven by seasonal changes in the basal water pressure. Our findings provide a cautionary note that should be considered in studies that attempt to relate and infer future response from surface temperature, melt, and runoff from point measurements and/or modeling with measurements of proglacial discharge and ice dynamics. © 2015 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945208619&doi=10.1002%2f2015GL065393&partnerID=40&md5=4432ff4d7ca402cd97cf52924c27c14e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9019
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Sciences Air, Water, and Landscape Science, Uppsala University, Uppsala, Sweden
Recommended Citation:
Lindbäck K.,Pettersson R.,Hubbard A.L.,et al. Subglacial water drainage, storage, and piracy beneath the Greenland ice sheet[J]. Geophysical Research Letters,2015-01-01,42(18).