DOI: 10.1002/2016GL070430
论文题名: Rapid ice flow rearrangement induced by subglacial drainage in West Antarctica
作者: Elsworth C.W. ; Suckale J.
刊名: Geophysical Research Letters
ISSN: 0094-8374
EISSN: 1944-8105
出版年: 2016
卷: 43, 期: 22 起始页码: 11697
结束页码: 11707
语种: 英语
英文关键词: ice sheet stability
; ice streams
; meltwater drainage
Scopus关键词: Deformation
; Glaciers
; Ice control
; Solvents
; Analytical results
; Ice sheet
; Ice streams
; Spatial variability
; Subglacial waters
; Surface observation
; Thermomechanical model
; Topographic control
; Ice
英文摘要: Ice streams are corridors of rapid ice flow draining the ice sheets. They can exhibit astonishing spatial variability on annual to centennial time scales. We propose that changes in the subglacial drainage of meltwater could induce these sudden rearrangements of ice streams. We develop a two-dimensional, thermomechanical model representing an ice stream cross section and couple it to a plastically deforming bed with spatially variable meltwater influx. We find that where ice flows over deformable sediments and lacks significant topographic control, the efficiency of subglacial water drainage exerts direct control on the velocity, location, and width of ice streams. This implies that meltwater percolation at the meter scale could have a significant effect on the short-term variability in ice loss from a continental-scale ice sheet. We verify our model against previous analytical results and validate it against surface observations from the Siple Coast of West Antarctica. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85003935932&doi=10.1002%2f2016GL070430&partnerID=40&md5=a409f193d12cd75bb98db3937ba9bc44
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9337
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 Geophysics, Stanford University, Stanford, CA, United States
Recommended Citation:
Elsworth C.W.,Suckale J.. Rapid ice flow rearrangement induced by subglacial drainage in West Antarctica[J]. Geophysical Research Letters,2016-01-01,43(22).