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Construction of a Tephra-Based Multi-Archive Coherent Chronological Framework 1 for the Last 2 Deglaciation in the Mediterranean Region

L. Bazin 1, 2 B. Lemieux-Dudon 3 G. Siani 4 A. Govin 1, 2 A. Landais 1, 5 D. Genty 1, 5 E. Michel 1, 6 S. Nomade 1, 6
2 CLIMAG - Climat et Magnétisme
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE
5 GLACCIOS - Glaces et Continents, Climats et Isotopes Stables
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE
6 PALEOCEAN - Paléocéanographie
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE
Abstract : Proxy records from different climate archives such as ice cores, speleothems or sediment cores are essential to define the sequence of events over to the last deglaciation. However, multi-archive comparison and compilation of data, necessary to assess the robustness of climate models, are rapidly limited by inconsistencies between archives' chronology. Here we present the development and validation of the Datice chronological integration tool for the construction of multi-archive coherent chronologies. This chronology building tool, first developed to date ice cores only, can now integrate deposition-like archives such as sediment cores and speleothems, independently or coherently. The robustness of this dating method resides in its capacity to build coherent chronologies for multiple archives with a proper calculation of chronological uncertainties. Using this tool, we were able to construct a coherent chronology for the last deglaciation in the Mediterranean region based on volcanic tephra layers correlation in terrestrial and marine sediment cores. We confirm the synchronicity, within chronological errors, of the sequence of events characterizing the last deglaciation between Greenland and the Mediterranean region, independently of any climatic alignment assumptions. Using this chronological framework, we however highlight some regional expression of this transition period in term of vegetation cover over the Mediterranean region.
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https://hal-cnrs.archives-ouvertes.fr/hal-03089446
Contributor : Dominique Genty Connect in order to contact the contributor
Submitted on : Monday, December 28, 2020 - 2:18:49 PM
Last modification on : Thursday, June 17, 2021 - 3:10:05 AM
Long-term archiving on: : Monday, March 29, 2021 - 6:42:41 PM

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L. Bazin, B. Lemieux-Dudon, G. Siani, A. Govin, A. Landais, et al.. Construction of a Tephra-Based Multi-Archive Coherent Chronological Framework 1 for the Last 2 Deglaciation in the Mediterranean Region. Quaternary Science Reviews, Elsevier, 2019, 216, pp.47-57. ⟨10.1016/j.quascirev.2019.05.018⟩. ⟨hal-03089446⟩

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