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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/cp-2019-125
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2019-125
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 04 Nov 2019

Submitted as: research article | 04 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Climate of the Past (CP).

Radionuclide wiggle-matching reveals a non-synchronous Early Holocene climate oscillation in Greenland and Western Europe around a grand solar minimum

Florian Mekhaldi1, Markus Czymzik2, Florian Adolphi1,3, Jesper Sjolte1, Svante Björck1, Ala Aldahan4, Achim Brauer5, Celia Martín-Puertas6, Göran Possnert7, and Raimund Muscheler1 Florian Mekhaldi et al.
  • 1Department of Geology -Quaternary Sciences, Lund University, 22362Lund, Sweden
  • 2Leibniz-Institute for Baltic Sea Research Warnemünde(IOW), Marine Geology, 18119 Rostock, Germany
  • 3Physics Institute, Climate and Environmental Physics & Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland
  • 4Department of Geology, United Arab Emirates University, 15551 Al Ain, UAE
  • 5GFZ-German Research Centre for Geosciences, Climate Dynamics and Landscape Evolution, 14473 Potsdam, Germany
  • 6Department of Geography, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
  • 7andem Laboratory, Uppsala University, 75120 Uppsala, Sweden

Abstract. Several climate events have been reported from the Early Holocene superepoch, the best known of these being the Preboreal oscillation (PBO). It is still unclear how the PBO and the number of climate events observed in Greenland ice cores and European terrestrial records are related to one another. This is mainly due to uncertainties in the chronologies of the records. Here, we present new high resolution 10Be concentration data from the varved Meerfelder Maar sediment record in Germany, spanning the period 11310–11000 years BP. These new data allow us to synchronize this well-studied record as well as Greenland ice-core records to the IntCal13 time-scale via radionuclide wiggle-matching. In doing so, we show that the climate oscillations identified in Greenland and Europe between 11450 and 11000 years BP were not synchronous but terminated and began, respectively, with the onset of a grand solar minimum. A similar spatial anomaly pattern is found in a number of modeling studies on solar forcing of climate in the North Atlantic region. We further postulate that freshwater delivery to the North Atlantic would have had the potential to amplify solar forcing through a slowdown of the Atlantic meridional overturning circulation (AMOC) reinforcing surface air temperature anomalies in the region.

Florian Mekhaldi et al.
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Short summary
Due to chronology uncertainties within paleo-archives, it is unclear how climate oscillations from different records relate to one another. By using radionuclides to synchronize Greenland ice cores and a German lake record over 11000 years ago, we show that two oscillations observed in these records were not synchronous but terminated and began with the onset of a grand solar minimum. Both this and changes in ocean circulation could have played a role in the two climate oscillations.
Due to chronology uncertainties within paleo-archives, it is unclear how climate oscillations...
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