globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.06.004
Scopus记录号: 2-s2.0-85020723000
论文题名:
Retreat patterns and dynamics of the Sentralbankrenna glacial system, central Barents Sea
作者: Esteves M.; Bjarnadóttir L.R.; Winsborrow M.C.M.; Shackleton C.S.; Andreassen K.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 169
起始页码: 131
结束页码: 147
语种: 英语
英文关键词: Barents Sea Ice Sheet ; Deglaciation ; Glacial dynamics ; Glacial geomorphology ; GZW ; Ice stream reconstruction ; Late quaternary ; Marine-based ice sheet ; MSGL ; Sentralbankrenna palaeo-ice stream
Scopus关键词: Dynamics ; Glacial geology ; Glaciers ; Sea ice ; Sea level ; Deglaciations ; Glacial geomorphology ; Ice sheet ; Ice streams ; Late quaternary ; MSGL ; Ice ; bathymetric survey ; deglaciation ; geomorphology ; glacier dynamics ; ice sheet ; Last Glacial Maximum ; Quaternary ; reconstruction ; sea level change ; Antarctic Ice Sheet ; Antarctica ; Arctic Ocean ; Barents Sea ; West Antarctic Ice Sheet ; West Antarctica
英文摘要: The Barents Sea Ice Sheet (BSIS) is a good palaeo-analogue for the present day West Antarctic Ice Sheet. Both were marine-based ice sheets, particularly vulnerable to ocean warming and sea-level rise. Understanding the BSIS ice dynamics and patterns of retreat since the Last Glacial Maximum (LGM) is useful in developing our knowledge of spatial and temporal variations during marine-based ice sheet retreat. While the western margins of the Barents Sea have been extensively studied, few studies have focused on the central regions, which hosted key ice stream tributaries and major ice domes and divides. Presenting a new high-resolution (5 m) bathymetric dataset, this glacial geomorphological study focuses on the Sentralbankrenna palaeo-glacial system in the central Barents Sea. A large number of grounding zone wedges, mega-scale glacial lineations and areas with tunnel valleys and palaeo-subglacial basins were identified. These form the basis for a six-stage reconstruction of ice stream retreat through deglaciation since the LGM. In reconstructing the retreat of the Sentralbankrenna Ice Stream, we document the rapid but highly spatially variable pattern of retreat of a marine-based ice sheet margin. The presence of several tunnel valleys and interconnected palaeo-subglacial basin systems indicates an abundance of meltwater, likely to have been stored and released through several discharge events, significantly influencing the ice stream margin dynamics. This study provides insight into the behaviour and dynamics of ice during the late stages of the BSIS deglaciation within the central Barents Sea, increasing our understanding of grounding line processes. © 2017 Elsevier Ltd
资助项目: We would like to acknowledge Kartverket (the Norwegian Hydrographic Service), the Geological Survey of Norway and the MAREANO programme for the provision of this dataset, used here under a CC by 4.0 license (https://creativecommons.org/licenses/by/4.0/legalcode). This is a contribution to CAGE (Centre for Arctic Gas Hydrate, Environment and Climate) that is funded by the Research Council of Norway through the Centre of Excellence funding scheme grant no. 223259. Furthermore, we would like to acknowledge the editor and reviewer, Neil Glasser, and our second reviewer, Stephen Livingstone, for their insightful and constructive comments, which have greatly helped to improve this manuscript.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59166
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作者单位: CAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, Norway; Geological Survey of Norway (NGU), Postboks 6315 Sluppen, Trondheim, Norway

Recommended Citation:
Esteves M.,Bjarnadóttir L.R.,Winsborrow M.C.M.,et al. Retreat patterns and dynamics of the Sentralbankrenna glacial system, central Barents Sea[J]. Quaternary Science Reviews,2017-01-01,169
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