Abstract
Six layers rich in ice-rafted debris and poor in foraminifera shells have been identified in sediments of last glacial age in the northern Atlantic (Heinrich, 1988; Broecker et al., 1990). Based on their geographic pattern and composition, these layers appear to be debris released during the melting of armadas of icebergs (Bond et al., 1992). Abundant limestone fragments in the ice-rafted debris and the exceptionally high 40K — 40Ar ages for the clay minerals point to Hudson Straits as the launching site. This interpretation is strengthened by the finding by Andrews and Tedesco (1992) of exceptionally thick Heinrich layers in cores from the Labrador Sea.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Andrews, J. T. and K. Tedesco, Geology, in press, 1992.
Bond, G., H. Heinrich, W. Broecker, L. Labeyrie, J. McManus, J. Andrews, S. Huon, R. Jantschik, S. Clasen, C. Simet, K. Tedesco, M. Klas, G. Bonani, and S. Ivy, Evidence for massive discharges of icebergs into the North Atlantic ocean during the last glacial period, Nature, 360, 245–249, 1992.
Broecker, W., G. Bond, M. Klas, E. Clark, and J. McManus, Origin of the northern Atlantic’s Heinrich events, Climate Dynamics, 6, 265–273, 1992.
Heinrich, H., Origin and consequences of cyclic ice rafting in the northeast Atlantic Ocean during the past 130,000 years, Quaternary Research, 29, 142–152, 1988.
Johnsen, S. J., H. B. Clausen, W. Dansgaard, K. Fuhrer, N. Gundestrup, C. U. Hammer, P. Iversen, J. Jouzel, B. Stauffer, and J. P. Steffensen, Irregular glacial interstarlials recorded in a new Greenland ice core, Nature, 359, 311–313, 1992.
Mikolajewicz, U. and E. Maier-Reimer, Internal secular variability in an ocean general circulation model, Climate Dynamics, 4, 145–156, 1990.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1993 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Broecker, W., Bond, G., McManus, J. (1993). Heinrich Events: Triggers of Ocean Circulation Change?. In: Peltier, W.R. (eds) Ice in the Climate System. NATO ASI Series, vol 12. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85016-5_10
Download citation
DOI: https://doi.org/10.1007/978-3-642-85016-5_10
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-85018-9
Online ISBN: 978-3-642-85016-5
eBook Packages: Springer Book Archive