globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.08.001
Scopus记录号: 2-s2.0-85028000796
论文题名:
Evidence for higher-than-average air temperatures after the 8.2 ka event provided by a Central European δ18O record
作者: Andersen N.; Lauterbach S.; Erlenkeuser H.; Danielopol D.L.; Namiotko T.; Hüls M.; Belmecheri S.; Dulski P.; Nantke C.; Meyer H.; Chapligin B.; von Grafenstein U.; Brauer A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 172
起始页码: 96
结束页码: 108
语种: 英语
英文关键词: 8.2 ka event ; Europe ; Holocene ; Lake sediments ; Palaeoclimatology ; Stable isotopes
英文摘要: The so-called 8.2 ka event represents one of the most prominent cold climate anomalies during the Holocene warm period. Accordingly, several studies have addressed its trigger mechanisms, absolute dating and regional characteristics so far. However, knowledge about subsequent climate recovery is still limited although this might be essential for the understanding of rapid climatic changes. Here we present a new sub-decadally resolved and precisely dated oxygen isotope (δ18O) record for the interval between 7.7 and 8.7 ka BP (103 calendar years before AD 1950), derived from the calcareous valves of benthic ostracods preserved in the varved lake sediments of pre-Alpine Mondsee (Austria). Besides a clear reflection of the 8.2 ka event, showing a good agreement in timing, duration and magnitude with other regional stable isotope records, the high-resolution Mondsee lake sediment record provides evidence for a 75-year-long interval of higher-than-average δ18O values directly after the 8.2 ka event, possibly reflecting increased air temperatures in Central Europe. This observation is consistent with evidence from other proxy records in the North Atlantic realm, thus most probably reflecting a hemispheric-scale climate signal rather than a local phenomenon. As a possible trigger we suggest an enhanced resumption of the Atlantic meridional overturning circulation (AMOC), supporting assumptions from climate model simulations. © 2017 Elsevier Ltd
资助项目: This study was funded as a part of the ESF EuroCLIMATE project DecLakes (project 04-ECLIM-FP29) through grants from the FWF (I35-B06), DFG (AN 554/1-2, BR 2208/2-2) and CNRS. We thank G. Roidmayr, M. Pichler, D. Berger, G. Arnold, M. Köhler, R. Niederreiter, Á. Baltanás, M. Desmet, B. Fanget, J. Nomade and J. Knoll for field and lab assistance and L. Kämpf for running the 2011–2013 lake water monitoring. The Institute for Water Ecology, Fisheries and Lake Research in Scharfling (particularly A. Jagsch and G. Bruschek) and the Research Institute for Limnology of the University of Innsbruck in Mondsee (particularly H. Höllerer) are acknowledged for logistic support. We thank Ana Moreno for editorial handling as well as C. Spötl and two anonymous reviewers for comments that helped to improve the manuscript. This is a contribution to the Helmholtz Association climate initiative REKLIM (Topic 8 – Rapid climate change from proxy data) and COST Action ES0907 INTIMATE. The Mondsee δ18Oostracods and calculated δ18Olake values are available in Supplementary Table 1 and via the PANGAEA database (https://www.pangaea.de).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59113
Appears in Collections:过去全球变化的重建

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作者单位: University of Kiel, Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Kiel, Germany; GFZ German Research Centre for Geosciences, Section 5.2 – Climate Dynamics and Landscape Evolution, Potsdam, Germany; University of Innsbruck, Institute of Geology, Innsbruck, Austria; University of Graz, Institute of Earth Sciences (Geology & Palaeontology), Graz, Austria; University of Gdańsk, Faculty of Biology, Department of Genetics, Laboratory of Limnozoology, Gdańsk, Poland; Laboratoire des Sciences du Climat et de l'Environnement, UMR 8212, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Periglacial Research Section, Potsdam, Germany; University of Arizona, Laboratory of Tree-Ring Research, Tucson, AZ, United States; Lund University, Department of Geology, Lund, Sweden; Former address: Austrian Academy of Sciences, Institute for Limnology, Mondsee, Austria

Recommended Citation:
Andersen N.,Lauterbach S.,Erlenkeuser H.,et al. Evidence for higher-than-average air temperatures after the 8.2 ka event provided by a Central European δ18O record[J]. Quaternary Science Reviews,2017-01-01,172
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