globalchange  > 影响、适应和脆弱性
DOI: 10.5194/cp-14-901-2018
Scopus记录号: 2-s2.0-85049252303
论文题名:
A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard-Oeschger events 5-8
作者: Jensen M.F.; Nummelin A.; Nielsen S.B.; Sadatzki H.; Sessford E.; Risebrobakken B.; Andersson C.; Voelker A.; Roberts W.H.G.; Pedro J.; Born A.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期:6
起始页码: 901
结束页码: 922
语种: 英语
Scopus关键词: climate modeling ; general circulation model ; Last Glacial ; marine isotope stage ; meridional circulation ; overturn ; planktonic foraminifera ; proxy climate record ; reconstruction ; sea surface temperature ; spatiotemporal analysis ; Atlantic Ocean ; Atlantic Ocean (North) ; Foraminifera
英文摘要: Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard-Oeschger (DO) events 5-8 (approximately 30-40ĝ€kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures during the DO events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO events 5-8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. We find that sea-surface temperature variability over the DO events is characterized by colder conditions in the subpolar North Atlantic during stadials than during interstadials, and the variability is linked to changes in the Atlantic Meridional Overturning circulation and in the sea-ice cover. Forced simulations are needed to capture the strength of the temperature variability and to reconstruct the variability in other climatic records not directly linked to the sea-surface temperature reconstructions. This is the first time the proxy surrogate reconstruction method has been applied to oceanic variability during MIS3. Our results remain robust, even when age uncertainties of proxy data, the number of available temperature reconstructions, and different climate models are considered. However, we also highlight shortcomings of the methodology that should be addressed in future implementations. © Author(s) 2018.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109551
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States; Climate and Computational Geophysics, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; Uni Research Climate and Bjerknes Centre for Climate Research, Bergen, Norway; Instituto Português Do Mar e da Atmosfera, Lisbon, and Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal; University of Bristol, Bristol, United Kingdom; Center for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; Institute of Physics, University of Bern, Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland

Recommended Citation:
Jensen M.F.,Nummelin A.,Nielsen S.B.,et al. A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard-Oeschger events 5-8[J]. Climate of the Past,2018-01-01,14(6)
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