DOI: 10.1016/j.quascirev.2013.08.003
Scopus记录号: 2-s2.0-84883440776
论文题名: Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica
作者: Siegert M. ; Ross N. ; Corr H. ; Kingslake J. ; Hindmarsh R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 78 起始页码: 98
结束页码: 107
语种: 英语
英文关键词: Ice rise
; Ice sheet stability
; Internal layers
; Marine ice sheet
Scopus关键词: Ice sheet
; Ice streams
; Ice-sheet retreat
; Internal layers
; Late Holocene
; Reorganisation
; Weddell Sea
; West antarctica
; Glaciers
; Ice
; deep sea
; deformation
; flow pattern
; Holocene
; ice flow
; ice retreat
; ice sheet
; uplift
; Antarctica
; Southern Ocean
; Weddell Sea
; West Antarctica
英文摘要: Here we report Late Holocene ice sheet and grounding-line changes to the Weddell Sea sector of West Antarctica. Internal radio-echo layering within the Bungenstock Ice Rise, which comprises very slow-flowing ice separating the fast-flowing Institute and Möller ice streams, reveals ice deformed by former enhanced flow, overlain by un-deformed ice. The ice-rise surface is traversed by surface lineations explicable as diffuse ice-flow generated stripes, which thus capture the direction of flow immediately prior to the creation of the ice rise. The arrangement of internal layers can be explained by adjustment to the flow path of the Institute Ice Stream, during either a phase of ice sheet retreat not longer than ~4000 years ago or by wholesale expansion of the grounding-line from an already retreated situation not sooner than ~400 years ago. Some combination of these events, involving uplift of the ice rise bed during ice stream retreat and reorganisation, is also possible. Whichever the case, the implication is that the ice sheet upstream of the Bungenstock Ice Rise, which currently grounds over a >1.5km deep basin has been, and therefore may be, susceptible to significant change. © 2013 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60506
Appears in Collections: 过去全球变化的重建
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作者单位: Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, United Kingdom; School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom; British Antarctic Survey, Cambridge CB3 0ET, United Kingdom
Recommended Citation:
Siegert M.,Ross N.,Corr H.,et al. Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica[J]. Quaternary Science Reviews,2013-01-01,78