DOI: 10.1002/grl.50764
论文题名: Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers
作者: Sole A. ; Nienow P. ; Bartholomew I. ; Mair D. ; Cowton T. ; Tedstone A. ; King M.A.
刊名: Geophysical Research Letters
ISSN: 0094-8715
EISSN: 1944-8446
出版年: 2013
卷: 40, 期: 15 起始页码: 3940
结束页码: 3944
语种: 英语
英文关键词: Global Positioning Systems
; Greenland ice sheet
; Ice sheet dynamics
; Ice sheet hydrology
; Ice sheet melt
Scopus关键词: Dynamic sensitivity
; Greenland Ice Sheet
; Ice sheet
; Ice sheet dynamics
; Interannual variation
; Negative correlation
; Positive correlations
; Subglacial channels
; Dynamic response
; Glaciers
; Global positioning system
; Melting
; Sensitivity analysis
; Ice
; annual variation
; climate conditions
; correlation
; drainage
; GPS
; ice flow
; ice movement
; melting
; sensitivity analysis
; summer
; velocity profile
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: We present ice velocities from a land-terminating transect extending >115 km into the western Greenland Ice Sheet during three contrasting melt years (2009-2011) to determine whether enhanced melting accelerates dynamic mass loss. We find no significant correlation between surface melt and annual ice flow. There is however a positive correlation between melt and summer ice displacement, but a negative correlation with winter displacement. This response is consistent with hydro-dynamic coupling; enhanced summer ice flow results from longer periods of increasing surface melting and greater duration ice surface to bed connections, while reduced winter motion is explicable by drainage of high basal water pressure regions by larger more extensive subglacial channels. Despite mean interannual surface melt variability of up to 70%, mean annual ice velocities changed by <7.5%. Increased summer melting thereby preconditions the ice-bed interface for reduced winter motion resulting in limited dynamic sensitivity to interannual variations in surface melting. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881140025&doi=10.1002%2fgrl.50764&partnerID=40&md5=8e3367f39ebfef2294df8748a0cc8f73
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5979
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geography, University of Sheffield, Winter Street, Sheffield S10 2TN, United Kingdom
Recommended Citation:
Sole A.,Nienow P.,Bartholomew I.,et al. Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers[J]. Geophysical Research Letters,2013-01-01,40(15).