Deglacial meltwater discharge, North Atlantic Deep Circulation, and abrupt climate change
Article first published online: 20 SEP 2012
Copyright 1991 by the American Geophysical Union.
Journal of Geophysical Research: Oceans (1978–2012)
Volume 96, Issue C9, pages 16811–16826, 15 September 1991
How to Cite
1991), Deglacial meltwater discharge, North Atlantic Deep Circulation, and abrupt climate change, J. Geophys. Res., 96(C9), 16811–16826, doi:10.1029/91JC01624., , , and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 23 MAY 1991
- Manuscript Received: 13 SEP 1990
High-resolution paleogeochemical data from the North Atlantic Ocean indicate that in the interval 15,000 to 10,000 14C years before present (B.P.) North Atlantic Deep Water (NADW) production was decreased or eliminated four times: at about 14,500 (and probably older), 13,500, 12,000 and 10,500 years B.P. Each of these changes occurred at the same time as abrupt events of meltwater discharge to the surface ocean (inferred from oxygen isotope studies of planktonic foraminifera and from glacial geological studies on land). In addition, each of these times may be associated with brief episodes of cooler climate in the North Atlantic region, the best example of which is the Younger Dryas cooling of 10,500 years ago. These results support models linking meltwater discharge, decreased NADW production, and decreased North Atlantic heat flux.