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Radiocarbon Reservoir Ages in the Mediterranean Sea and Black Sea

Published online by Cambridge University Press:  18 July 2016

Giuseppe Siani
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91118 Gif sur Yvette, France
Martine Paterne
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91118 Gif sur Yvette, France
Maurice Arnold
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91118 Gif sur Yvette, France
Edouard Bard
Affiliation:
CEREGE, Université Aix-Marseille III and CNRS UMR6536, Europôle de l'Arbois, BP 80, F-13545 Aix-en-Provence Cedex 4, France
Bernard Métivier
Affiliation:
Muséum National d'Histoire Naturelle, URA 699 – CNRS, 55 rue Buffon, 75005 Paris, France
Nadine Tisnerat
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91118 Gif sur Yvette, France
Franck Bassinot
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91118 Gif sur Yvette, France
Corresponding
E-mail address:
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Abstract

We measured apparent marine radiocarbon ages for the Mediterranean Sea, Black Sea, and Red Sea by accelerator mass spectrometry radiocarbon analyses of 26 modern, pre-bomb mollusk shells collected living between AD 1837 and 1950. The marine reservoir (R(t)) ages were estimated at some 390 ± 85 yr BP, 415 ± 90 yr BP and 440 ± 40 yr BP, respectively. R(t) ages in the Mediterranean Sea and Black Sea are comparable to those for the North Atlantic Ocean (<65°N), in accordance with the modern oceanic circulation pattern. The ΔR values of about 35 ± 70 yr and 75 ± 60 yr in the Mediterranean area show that the global box-diffusion carbon model, used to calculate R(t) ages, reproduces the measured marine 14C R(t) ages in these oceanic areas. Nevertheless, high values of standard deviations, larger than measurement uncertainties are obtained and express decadal R(t) changes. Such large standard deviations are indeed related to a decrease of the apparent marine ages of some 220 yr from 1900 AD to 1930 AD in both the Mediterranean Sea and the western North Atlantic Ocean.

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Articles
Copyright
Copyright © 2000 by the Arizona Board of Regents on behalf of the University of Arizona 

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