globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.10.009
Scopus记录号: 2-s2.0-84994246458
论文题名:
The build-up, configuration, and dynamical sensitivity of the Eurasian ice-sheet complex to Late Weichselian climatic and oceanic forcing
作者: Patton H.; Hubbard A.; Andreassen K.; Winsborrow M.; Stroeven A.P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 153
起始页码: 97
结束页码: 121
语种: 英语
英文关键词: Barents Sea ice sheet ; Dynamic ice behaviour ; Eurasian ice sheet complex ; Fennoscandian ice sheet ; Ice-sheet modelling ; Landscape evolution ; Late Weichselian ; Palaeo climate ; Palaeo ice-sheet reconstruction ; Subglacial erosion
Scopus关键词: Climate models ; Erosion ; Gas hydrates ; Glacial geology ; Glaciers ; Sea ice ; Sea level ; Ice sheet ; Ice sheet modelling ; Ice sheet reconstruction ; Landscape evolutions ; Late Weichselian ; Palaeo climate ; Ice ; continental shelf ; flow modeling ; ice sheet ; landscape evolution ; Last Glacial Maximum ; paleoclimate ; reconstruction ; sea level ; spatial resolution ; subglacial environment ; thermomechanics ; Weichselian ; Arctic Ocean ; Atlantic Ocean ; Barents Sea ; Kara Sea ; North Sea ; Norwegian Shelf [North Sea] ; Southern Ocean
英文摘要: The Eurasian ice-sheet complex (EISC) was the third largest ice mass during the Last Glacial Maximum (LGM), after the Antarctic and North American ice sheets. Despite its global significance, a comprehensive account of its evolution from independent nucleation centres to its maximum extent is conspicuously lacking. Here, a first-order, thermomechanical model, robustly constrained by empirical evidence, is used to investigate the dynamics of the EISC throughout its build-up to its maximum configuration. The ice flow model is coupled to a reference climate and applied at 10 km spatial resolution across a domain that includes the three main spreading centres of the Celtic, Fennoscandian and Barents Sea ice sheets. The model is forced with the NGRIP palaeo-isotope curve from 37 ka BP onwards and model skill is assessed against collated flowsets, marginal moraines, exposure ages and relative sea-level history. The evolution of the EISC to its LGM configuration was complex and asynchronous; the western, maritime margins of the Fennoscandian and Celtic ice sheets responded rapidly and advanced across their continental shelves by 29 ka BP, yet the maximum aerial extent (5.48 × 106 km2) and volume (7.18 × 106 km3) of the ice complex was attained some 6 ka later at c. 22.7 ka BP. This maximum stand was short-lived as the North Sea and Atlantic margins were already in retreat whilst eastern margins were still advancing up until c. 20 ka BP. High rates of basal erosion are modelled beneath ice streams and outlet glaciers draining the Celtic and Fennoscandian ice sheets with extensive preservation elsewhere due to frozen subglacial conditions, including much of the Barents and Kara seas. Here, and elsewhere across the Norwegian shelf and North Sea, high pressure subglacial conditions would have promoted localised gas hydrate formation. © 2016 The Authors
资助项目: The research is part of the Centre for Arctic Gas Hydrate, Environment and Climate, and was supported by the Research Council of Norway through its Centres of Excellence funding scheme (grant 223259), the PetroMaks project “Glaciations in the Barents Sea area (GlaciBar)” (grant 200672), and a Stockholm Uni SUCLIM consortium grant (to Stroeven) that supported Hubbard in the early development of the model code. We thank Adrian Hall for helpful comments on the manuscript. We also thank Caroline Clason and the editor Neil Glasser for their constructive feedback during the peer review process.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59387
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作者单位: CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geology, UiT The Arctic University of Norway, Tromsø, Norway; Geomorphology and Glaciology, Department of Physical Geography, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Sweden

Recommended Citation:
Patton H.,Hubbard A.,Andreassen K.,et al. The build-up, configuration, and dynamical sensitivity of the Eurasian ice-sheet complex to Late Weichselian climatic and oceanic forcing[J]. Quaternary Science Reviews,2016-01-01,153
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