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Climate dynamics during the penultimate glacial period recorded in a speleothem from Kanaan Cave, Lebanon (central Levant)

Nehme, Carole; Verheyden, Sophie; Breitenbach, Sebastian F.M.; Gillikin, David P.; Verheyden, Anouk; Cheng, Hai; Edwards, R. Lawrence; Hellstrom, John; Noble, Stephen R.; Farrant, Andrew R.; Sahy, Diana; Goovaerts, Thomas; Salem, Ghada; Claeys, Philippe. 2018 Climate dynamics during the penultimate glacial period recorded in a speleothem from Kanaan Cave, Lebanon (central Levant). Quaternary Research, 90 (1). 10-25. https://doi.org/10.1017/qua.2018.18

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Abstract/Summary

Little is known about terrestrial climate dynamics in the Levant during the penultimate interglacial-glacial period. To decipher the palaeoclimatic history of the Marine Oxygen Isotope Stage (MIS) 6 glacial period, a well-dated stalagmite (~194 to ~154 ka) from Kanaan Cave on the Mediterranean coast in Lebanon was analyzed for its petrography, growth history, and stable isotope geochemistry. A resolved climate record has been recovered from this precisely U–Th dated speleothem, spanning the late MIS 7 and early MIS 6 at low resolution and the mid–MIS 6 at higher resolution. The stalagmite grew discontinuously from ~194 to ~163 ka. More consistent growth and higher growth rates between ~163 and ~154 ka are most probably linked to increased water recharge and thus more humid conditions. More distinct layering in the upper part of the speleothem suggests strong seasonality from ~163 ka to ~154 ka. Short-term oxygen and carbon isotope excursions were found between ~155 and ~163 ka. The inferred Kanaan Cave humid intervals during the mid–MIS 6 follow variations of pollen records in the Mediterranean basins and correlate well with the synthetic Greenland record and East Asian summer monsoon interstadial periods, indicating short warm/wet periods similar to the Dansgaard-Oeschger events during MIS 4–3 in the eastern Mediterranean region.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1017/qua.2018.18
ISSN: 0033-5894
Date made live: 16 Nov 2018 14:04 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/521601

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