Articles | Volume 12, issue 11
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, Claire Waelbroeck, Yiming Luo, Didier M. Roche, Sylvain Pichat, Samuel L. Jaccard, Jeanne Gherardi, Aline Govin, Jörg Lippold, and François Thil

Data sets

The Atlantic Meridional Overturning Circulation during the last glacial P. Burckel, C. Waelbroeck, Y. Luo, D. M. Roche, S. Pichat, S. L. Jaccard, J.-M. Gherardi, A. Govin, J. Lippold, and F. Thil

Short summary
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.