DOI: 10.1002/grl.50712
论文题名: Sediment deposition at the modern grounding zone of Whillans Ice Stream, West Antarctica
作者: Horgan H.J. ; Christianson K. ; Jacobel R.W. ; Anandakrishnan S. ; Alley R.B.
刊名: Geophysical Research Letters
ISSN: 0094-8692
EISSN: 1944-8423
出版年: 2013
卷: 40, 期: 15 起始页码: 3934
结束页码: 3939
语种: 英语
英文关键词: glaciology
; grounding zone
; ice sheet dynamics
Scopus关键词: glaciology
; Grounding-zone wedges
; Ice sheet dynamics
; Sediment deposition
; Sedimentary deposits
; Subglacial meltwater
; Threshold behavior
; West antarctica
; Deposits
; Glaciers
; geophysical survey
; glacial deposit
; glacial hydrology
; grounding line
; ice sheet
; ice shelf
; image analysis
; marine ecosystem
; meltwater
; timescale
; Antarctica
; West Antarctic Ice Sheet
; West Antarctica
; Whillans Ice Stream
英文摘要: Much of the threshold behavior of marine ice sheets is thought to result from processes occurring at the grounding zone, where the ice sheet transitions into the ice shelf. At short timescales (decades to centuries), grounding zone behavior is likely to be influenced by ongoing sediment deposition, which can stabilize the grounding zone position. We present a ground-based geophysical study across the modern grounding zone of Whillans Ice Stream. Within an embayment setting, where subglacial meltwater drains, we image sedimentary deposits; however, we do not observe the classic asymmetric grounding zone wedge deposits, which are found in the paleorecord and are thought to stabilize the grounding zone position. At an adjacent peninsula, we image the grounding zone and an ice-shelf pinning point and again observe no wedge deposits. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880869149&doi=10.1002%2fgrl.50712&partnerID=40&md5=8a860c913e909fb2430e0dc07ef7542d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5956
Appears in Collections: 气候减缓与适应
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作者单位: Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
Recommended Citation:
Horgan H.J.,Christianson K.,Jacobel R.W.,et al. Sediment deposition at the modern grounding zone of Whillans Ice Stream, West Antarctica[J]. Geophysical Research Letters,2013-01-01,40(15).