High-resolution foraminifer stable isotope record of MIS 19 at Montalbano Jonico, southern Italy: A window into Mediterranean climatic variability during a low-eccentricity interglacial

Understanding millennial and sub-millennial climate variability during past low eccentricity interglacials similar to the Holocene is important for forecasting the evolution of climate and natural variability. The Ideale section (Montalbano Jonico, Southern Italy) studied here provides one of the be...

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Published in:Quaternary science reviews 2019-02, Vol.205, p.106-125
Main Authors: Nomade, S., Bassinot, F., Marino, M., Simon, Q., Dewilde, F., Maiorano, P., Isguder, G., Blamart, D., Girone, A., Scao, V., Pereira, A., Toti, F., Bertini, A., Combourieu-Nebout, N., Peral, M., Bourlès, D.L., Petrosino, P., Gallicchio, S., Ciaranfi, N.
Format: Article
Language:English
Subjects:
40Ar/39Ar dating
Climatology
Continental biomarkers
Cosmogenic isotopes
Earth Sciences
Environmental Sciences
Geochemistry
Global Changes
Italy
Micropaleontology
MIS 19
Montalbano-Jonico
Paleoclimatology
Paleontology
Sciences of the Universe
Stable isotopes
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Summary:Understanding millennial and sub-millennial climate variability during past low eccentricity interglacials similar to the Holocene is important for forecasting the evolution of climate and natural variability. The Ideale section (Montalbano Jonico, Southern Italy) studied here provides one of the best records of MIS 19c, the closest orbital analog to the Holocene. This exposed marine series covers Termination IX to the inception of MIS 18 with very high sedimentation rates (i.e. 90–200 cm/ka). We present 1) benthic δ18O and δ13C records at 90–200 year time-resolution, 2) a new 40Ar/39Ar age of 774.1 ± 0.9 ka for tephra layer V4 (Matuyama-Brunhes transitional period) and 3) new calcareous plankton, palynological and authigenic 10Be/9Be data. Our new Bayesian depth-age model suggests a 11.5 ± 3.4 ka (95% confidence) duration for the climatic optimum. The δ18O series reveals millennial-scale oscillations (with sharp transitions 
ISSN:0277-3791
1873-457X
DOI:10.1016/j.quascirev.2018.12.008