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Science 25 June 2004:
Vol. 304. no. 5679, pp. 1919 - 1920
DOI: 10.1126/science.1100374
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Perspectives

OCEAN SCIENCE:
Hemispheric Asynchrony of Abrupt Climate Change

Jean Lynch-Stieglitz

During the past 80,000 years there have been rapid climate swings that occurred synchronously throughout the Northern Hemisphere. However, there has been intense debate over whether these changes were global, occurring at the same time in the Southern Hemisphere. In her Perspective, Lynch-Stieglitz comments on new work (Lamy et al.) that supports the well-developed paradigm of asynchronous changes in the Northern and Southern Hemispheres and suggests why most land-based records appear to support hemispheric synchrony.

The author is in the School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA. E-mail: jean{at}eas.gatech.edu

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