globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2767
论文题名:
Reorganization of the North Atlantic Oscillation during early Holocene deglaciation
作者: Wassenburg J.A.; Dietrich S.; Fietzke J.; Fohlmeister J.; Jochum K.P.; Scholz D.; Richter D.K.; Sabaoui A.; Spötl C.; Lohmann G.; Andreae M.O.; Immenhauser A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:8
起始页码: 602
结束页码: 605
语种: 英语
Scopus关键词: atmospheric pressure ; climate modeling ; deglaciation ; Holocene ; Laurentide Ice Sheet ; meltwater ; meridional circulation ; North Atlantic Oscillation ; rainfall ; sea level pressure ; surface water ; Africa ; Arctic ; Asia ; Atlantic Ocean ; Atlantic Ocean (North) ; Azores ; Europe ; Greenland ; Greenland Ice Sheet ; Iceland ; Mediterranean Region ; Portugal
英文摘要: The North Atlantic Oscillation is the dominant atmospheric pressure mode in the North Atlantic region and affects winter temperature and precipitation in the Mediterranean, northwest Europe, Greenland, and Asia. The index that describes the sea-level pressure difference between Iceland and the Azores is correlated with a dipole precipitation pattern over northwest Europe and northwest Africa. How the North Atlantic Oscillation will develop as the Greenland ice sheet melts is unclear. A potential past analogue is the early Holocene, during which melting ice sheets around the North Atlantic freshened surface waters, affecting the strength of the meridional overturning circulation. Here we present a Holocene rainfall record from northwest Africa based on speleothem 18 O and compare it against a speleothem-based rainfall record from Europe. The two records are positively correlated during the early Holocene, followed by a shift to an anti-correlation, similar to the modern record, during the mid-Holocene. On the basis of our simulations with an Earth system model, we suggest the shift to the anti-correlation reflects a large-scale atmospheric and oceanic reorganization in response to the demise of the Laurentide ice sheet and a strong reduction of meltwater flux to the North Atlantic, pointing to a potential sensitivity of the North Atlantic Oscillation to the melting of ice sheets. © 2016 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105960
Appears in Collections:气候减缓与适应
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作者单位: Institute of Geology, Mineralogy, and Geophysics, Ruhr University Bochum, Universitätsstrasse 150, Bochum, Germany; Institute for Geosciences, University of Mainz, Johann-Joachim-Becher-Weg 21, Mainz, Germany; Federal Institute for Hydrology, Koblenz, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Helmholtz Centre for Ocean Research Kiel (GEOMAR), Wischhofstrasse 1-3, Kiel, Germany; Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, Heidelberg, Germany; Climate Geochemistry and Biogeochemistry Departments, Max Planck Institute for Chemistry, PO Box 3060, Mainz, Germany; Faculty of Sciences Dhar Mahraz, BP 1796 Atlas, Fès, Morocco; Institute of Geology, University of Innsbruck, Innrain 52, Innsbruck, Austria; Biogeochemistry Department, Max Planck Institute for Chemistry, PO Box 3060, Mainz, Germany

Recommended Citation:
Wassenburg J.A.,Dietrich S.,Fietzke J.,et al. Reorganization of the North Atlantic Oscillation during early Holocene deglaciation[J]. Nature Geoscience,2016-01-01,9(8)
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