Articles | Volume 12, issue 11
Clim. Past, 12, 2061–2075, 2016
https://doi.org/10.5194/cp-12-2061-2016
Clim. Past, 12, 2061–2075, 2016
https://doi.org/10.5194/cp-12-2061-2016
Research article
08 Nov 2016
Research article | 08 Nov 2016

Changes in the geometry and strength of the Atlantic meridional overturning circulation during the last glacial (20–50 ka)

Pierre Burckel et al.

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Cited articles

Anderson, R. F., Fleisher, M. Q., and Lao, Y.: Glacial-interglacial variability in the delivery of dust to the central equatorial Pacific Ocean, Earth Planet. Sc. Lett., 242, 406–414, https://doi.org/10.1016/j.epsl.2005.11.061, 2006.
Böhm, E., Lippold, J., Gutjahr, M., Frank, M., Blaser, P., Antz, B., Fohlmeister, J., Frank, N., Andersen, M. B., and Deininger, M.: Strong and deep Atlantic meridional overturning circulation during the last glacial cycle, Nature, 517, 73–76, https://doi.org/10.1038/nature14059, 2015.
Bourillet, J.-F., Damy, G., Dussud, L., Sultan, N., Woerther, P., and Migeon, S.: Behaviour Of A Piston Corer From Accelerometers And New Insights On Quality Of The Recovery., Proc. 6th Int. Off shore Site Investig, Geotech. Conf., Confronting New Challenges Shar, Knowledge, 11–13 Sept. 2007, London, UK, available at: http://archimer.ifremer.fr/doc/00071/18198/ (last access: 3 November 2016), 2007.
Boyle, E. A.: Is ocean thermohaline circulation linked to abrupt stadial/interstadial transitions?, Quaternary Sci. Rev., 19, 255–272, https://doi.org/10.1016/S0277-3791(99)00065-7, 2000.
Bradtmiller, L. I., McManus, J. F., and Robinson, L. F.: 231Pa ∕ 230Th evidence for a weakened but persistent Atlantic meridional overturning circulation during Heinrich Stadial 1, Nat. Commun., 5, 5817, https://doi.org/10.1038/ncomms6817, 2014.
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In this paper, we compare new and published Atlantic sedimentary Pa/Th data with Pa/Th simulated using stream functions generated under various climatic conditions. We show that during Greenland interstadials of the 20–50 ka period, the Atlantic meridional overturning circulation was very different from that of the Holocene. Moreover, southern-sourced waters dominated the Atlantic during Heinrich stadial 2, a slow northern-sourced water mass flowing above 2500 m in the North Atlantic.