DOI: 10.1002/2014GL059976
论文题名: Similarity of organized patterns in driving and basal stresses of Antarctic and Greenland ice sheets beneath extensive areas of basal sliding
作者: Sergienko O.V. ; Creyts T.T. ; Hindmarsh R.C.A.
刊名: Geophysical Research Letters
ISSN: 0094-10622
EISSN: 1944-10353
出版年: 2014
卷: 41, 期: 11 起始页码: 3925
结束页码: 3932
语种: 英语
英文关键词: ice flow
; ice sheet
Scopus关键词: Deformation
; Glacial geology
; Ice
; Sea level
; Shear stress
; Antarctic ice sheets
; Basal shear stress
; Greenland Ice Sheet
; Ice flow
; Ice sheet
; Internal deformation
; Pattern-forming instability
; Spatial and temporal scale
; Glaciers
; deformation
; ice flow
; ice sheet
; sea level
; sliding
; spatiotemporal analysis
; velocity profile
; Arctic
; Greenland
; Greenland Ice Sheet
; Southern Ocean
英文摘要: The rate of ice transport from the interior of ice sheets to their margins, and hence the rate with which it contributes to sea level, is determined by the balance of driving stress, basal resistance, and ice internal deformation. Using recent high-resolution observations of the Antarctic and Greenland ice sheets, we compute driving stress and ice deformation velocities, inferring basal traction by inverse techniques. The results reveal broad-scale organization in 5-20 km band-like patterns in both the driving and basal shear stresses located in zones with substantial basal sliding. Both ice sheets experience basal sliding over areas substantially larger than previously recognized. The likely cause of the spatial patterns is the development of a band-like structure in the basal shear stress distribution that is the results of pattern-forming instabilities related to subglacial water. The similarity of patterns on the Greenland and Antarctic ice sheets suggests that the flow of ice sheets is controlled by the same fundamental processes operating at their base, which control ice sheet sliding and are highly variable on relatively short spatial and temporal scales, with poor predictability. This has far-reaching implications for understanding of the current and projection of the future ice sheets' evolution. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901866050&doi=10.1002%2f2014GL059976&partnerID=40&md5=5420b652793130bf6649da4b861d1dfa
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7886
Appears in Collections: 气候减缓与适应
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作者单位: GFDL/AOS Princeton University, Princeton, NJ, United States
Recommended Citation:
Sergienko O.V.,Creyts T.T.,Hindmarsh R.C.A.. Similarity of organized patterns in driving and basal stresses of Antarctic and Greenland ice sheets beneath extensive areas of basal sliding[J]. Geophysical Research Letters,2014-01-01,41(11).