Evidence for higher-than-average air temperatures after the 8.2 ka event provided by a Central European δ18O record

Nils Andersen , Stefan Lauterbach , Helmut Erlenkeuser , Dan L. Danielopol , Tadeusz Namiotko , Matthias Hüls , Soumaya Belmecheri , Peter Dulski , Carla Nantke , Hanno Meyer , Bernhard Chapligin , Ulrich von Grafenstein , Achim Brauer

Abstract

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.
Author Nils Andersen
Nils Andersen,,
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, Stefan Lauterbach
Stefan Lauterbach,,
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, Helmut Erlenkeuser
Helmut Erlenkeuser,,
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, Dan L. Danielopol
Dan L. Danielopol,,
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, Tadeusz Namiotko KGiB
Tadeusz Namiotko,,
- Katedra Genetyki i Biosystematyki
, Matthias Hüls
Matthias Hüls,,
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, Soumaya Belmecheri
Soumaya Belmecheri,,
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, Peter Dulski
Peter Dulski,,
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, Carla Nantke
Carla Nantke,,
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, Hanno Meyer
Hanno Meyer,,
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et al.`
Other language title versions
Journal seriesQuaternary Science Reviews, ISSN 0277-3791
Issue year2017
Vol172
Pages96-108
Publication size in sheets0.6
Keywords in EnglishHolocene, palaeoclimatology, Europe, stable isotopes, 8.2 ka event, lake sediments
DOIDOI:10.1016/j.quascirev.2017.08.001
URL https://doi.org/10.1016/j.quascirev.2017.08.001
Languageen angielski
Score (nominal)45
ScoreMinisterial score = 45.0, 20-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 20-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 4.797 (2) - 2016=5.227 (5)
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