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DOI	10.1016/j.quascirev.2020.106457
	Glacial dynamics and deglacial retreat pattern in fingerdjupet trough; western barents sea
	Jakobsen F.W.; Bjarnadóttir L.R.; Bøe R.
发表日期	2020
ISSN	0277-3791
卷号	243
英文摘要	New high-resolution multibeam bathymetry and sub-bottom profile datasets from Fingerdjupet are used for the first detailed geomorphological mapping of the seafloor in this area. The mapped landforms provide evidence for a palaeo-ice stream flowing in a southeasterly direction from Spitsbergenbanken into Fingerdjupet, merging with Bjørnøyrenna ice stream, and confirm a theorised palaeo-ice divide located along the bank. The combined landform records and acoustic stratigraphy allow a detailed reconstruction of the glacial dynamics during the last deglaciation. The withdrawal of the Fingerdjupet ice stream from Bjørnøyrenna was characterised by rapid retreat, punctuated by periods of stable ice marginal conditions. Five to six major ice margin stillstands and/or readvances associated with the last deglaciation are identified in the seafloor record and acoustic stratigraphy. During these events, large grounding zone wedges were deposited at the ice stream margin. The seabed geomorphology indicates that ice stream dynamics changed as the ice stream retreated from the trough onto the shallower bank. Here, numerous retreat moraines indicate that a grounded ice margin retreated slowly, with several minor stillstands, towards north-northwest. Several controls and/or drivers on the style of ice flow and retreat have been suggested, including catchment size reduction, sea level rise, bedrock topography, drawdown of bank ice and/or migration of the main ice divide over the bank. © 2020 The Author(s)
英文关键词	Barents sea ice sheet; Deglaciation; Glacial dynamics; Glacial geomorphology; Ice sheet reconstruction; Ice stream; Spitsbergenbanken
语种	英语
scopus关键词	Bathymetry; Catchments; Dynamics; Geomorphology; Glacial geology; Landforms; Sea level; Stratigraphy; Topography; Catchment size; Geomorphological mapping; Grounding-zone wedges; Last deglaciation; Marginal conditions; Multibeam bathymetry; Sea level rise; Sub-bottom profiles; Ice; deglaciation; geomorphology; glacier retreat; grounding line; ice flow; ice stream; landform; last deglaciation; seafloor; Arctic Ocean; Barents Sea; Bjornoyrenna; Spitsbergenbanken
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151377
作者单位	Geological Survey of Norway (NGU), Postal Box 6315 Torgarden, Trondheim, 7491, Norway
推荐引用方式 GB/T 7714	Jakobsen F.W.,Bjarnadóttir L.R.,Bøe R.. Glacial dynamics and deglacial retreat pattern in fingerdjupet trough; western barents sea[J],2020,243.
APA	Jakobsen F.W.,Bjarnadóttir L.R.,&Bøe R..(2020).Glacial dynamics and deglacial retreat pattern in fingerdjupet trough; western barents sea.Quaternary Science Reviews,243.
MLA	Jakobsen F.W.,et al."Glacial dynamics and deglacial retreat pattern in fingerdjupet trough; western barents sea".Quaternary Science Reviews 243(2020).