Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/808775

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Title
Evidence for obliquity forcing of glacial termination II
Author/Creator
Drysdale, R. N.;  Hellstrom, J. C.;  Zanchetta, G.;  Fallick, A. E.;  Sánchez Goñi, M. F.;  Couchoud, I.;  McDonald, J.;  Maas, R.;  Lohmann, G.;  Isola, I.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Sciences
Description
Variations in the intensity of high-latitude Northern Hemisphere summer insolation, driven largely by precession of the equinoxes, are widely thought to control the timing of Late Pleistocene glacial terminations. However, recently it has been suggested that changes in Earth’s obliquity may be a more important mechanism. We present a new speleothem-based North Atlantic marine chronology that shows that the penultimate glacial termination (Termination II) commenced 141,000 ± 2500 years before the present, too early to be explained by Northern Hemisphere summer insolation but consistent with changes in Earth’s obliquity. Our record reveals that Terminations I and II are separated by three obliquity cycles and that they started at near-identical obliquity phases.
Relation
Science Vol. 325, Issue 5947, p. 1527-1531
Publisher Link
http://dx.doi.org/10.1126/science.1170371
Date
2009
Publisher
American Association for the Advancement of Science
Keyword(s)
glacial terminations;  insolation;  obliquity
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/808775
Identifier
ISSN:0036-8075
Reviewed
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Subject
"Science"
 
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