DOI: 10.1016/j.quascirev.2016.08.014
Scopus记录号: 2-s2.0-84983440530
论文题名: Long-term record of Barents Sea Ice Sheet advance to the shelf edge from a 140,000 year record
作者: Pope E.L. ; Talling P.J. ; Hunt J.E. ; Dowdeswell J.A. ; Allin J.R. ; Cartigny M.J.B. ; Long D. ; Mozzato A. ; Stanford J.D. ; Tappin D.R. ; Watts M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 150 起始页码: 55
结束页码: 66
语种: 英语
英文关键词: Barents Sea Ice Sheet
; Glacigenic debris-flows
; Ice sheet
; Ice stream
; Sedimentary records
; Trough-Mouth Fan
; Weichselian
Scopus关键词: Debris
; Glacial geology
; Glaciers
; Landforms
; Sea ice
; Sediments
; Glacigenic debris flows
; Ice sheet
; Ice streams
; Sedimentary records
; Weichselian
; Ice
; debris flow
; glacial debris
; glacial landform
; glacier advance
; glaciomarine deposit
; historical record
; ice retreat
; ice sheet
; ice stream
; Last Glacial Maximum
; long-term change
; Saalian
; shelf break
; Weichselian
; Arctic
; Arctic Ocean
; Barents Sea
; Bjornoyrenna
; Scandinavia
; Svalbard
; Svalbard and Jan Mayen
英文摘要: The full-glacial extent and deglacial behaviour of marine-based ice sheets, such as the Barents Sea Ice Sheet, is well documented since the Last Glacial Maximum about 20,000 years ago. However, reworking of older sea-floor sediments and landforms during repeated Quaternary advances across the shelf typically obscures their longer-term behaviour, which hampers our understanding. Here, we provide the first detailed long-term record of Barents Sea Ice Sheet advances, using the timing of debris-flows on the Bear Island Trough-Mouth Fan. Ice advanced to the shelf edge during four distinct periods over the last 140,000 years. By far the largest sediment volumes were delivered during the oldest advance more than 128,000 years ago. Later advances occurred from 68,000 to 60,000, 39,400 to 36,000 and 26,000 to 20,900 years before present. The debris-flows indicate that the dynamics of the Saalian and the Weichselian Barents Sea Ice Sheet were very different. The repeated ice advance and retreat cycles during the Weichselian were shorter lived than those seen in the Saalian. Sediment composition shows the configuration of the ice sheet was also different between the two glacial periods, implying that the ice feeding the Bear Island Ice stream came predominantly from Scandinavia during the Saalian, whilst it drained more ice from east of Svalbard during the Weichselian. © 2016 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59442
Appears in Collections: 过去全球变化的重建
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作者单位: National Oceanography Centre, European Way, Southampton, United Kingdom; Departments of Earth Science and Geography, University of Durham, Durham, United Kingdom; Scott Polar Research Institute, University of Cambridge, Lensfield Road, Cambridge, United Kingdom; British Geological Survey, Keyworth, United Kingdom; Department of Geography, University of Swansea, United Kingdom
Recommended Citation:
Pope E.L.,Talling P.J.,Hunt J.E.,et al. Long-term record of Barents Sea Ice Sheet advance to the shelf edge from a 140,000 year record[J]. Quaternary Science Reviews,2016-01-01,150