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Science 2 October 1998:
Vol. 282. no. 5386, pp. 92 - 95
DOI: 10.1126/science.282.5386.92

Reports

Synchronous Climate Changes in Antarctica and the North Atlantic

E. J. Steig, *dagger E. J. Brook, J. W. C. White, C. M. Sucher, M. L. Bender, S. J. Lehman, D. L. Morse, E. D. Waddington, G. D. Clow

Central Greenland ice cores provide evidence of abrupt changes in climate over the past 100,000 years. Many of these changes have also been identified in sedimentary and geochemical signatures in deep-sea sediment cores from the North Atlantic, confirming the link between millennial-scale climate variability and ocean thermohaline circulation. It is shown here that two of the most prominent North Atlantic events--the rapid warming that marks the end of the last glacial period and the Bølling/Allerød-Younger Dryas oscillation--are also recorded in an ice core from Taylor Dome, in the western Ross Sea sector of Antarctica. This result contrasts with evidence from ice cores in other regions of Antarctica, which show an asynchronous response between the Northern and Southern Hemispheres.

E. J. Steig, J. W. C. White, S. J. Lehman, Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, USA. E. J. Brook, Department of Geology, Washington State University, Vancouver, WA 98686, USA. C. M. Sucher, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA. M. L. Bender, Department of Geosciences, Princeton University, Princeton, NJ 08544, USA. D. L. Morse, Institute for Geophysics, University of Texas, Austin, TX 78759, USA. E. D. Waddington, Geophysics Program, University of Washington, Seattle, WA 98195, USA. G. D. Clow, United States Geological Survey, Denver Federal Center, Englewood, CO 80225, USA.
*   To whom correspondence should be addressed. E-mail: steig{at}colorado.edu

dagger    Present address: Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA 19104, USA.


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