Evidence for obliquity forcing of glacial termination II

Title: Evidence for obliquity forcing of glacial termination II
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.
Relation: Science Vol. 325, Issue 5947, p. 1527-1531
Publisher Link: http://dx.doi.org/10.1126/science.1170371
Publisher: American Association for the Advancement of Science
Resource Type: journal article
Date: 2009
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.
Subject: glacial terminations; insolation; obliquity
Identifier: uon:7742
Identifier: http://hdl.handle.net/1959.13/808775
Identifier: ISSN:0036-8075
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