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Science 29 August 1997:
Vol. 277. no. 5330, pp. 1294 - 1296
DOI: 10.1126/science.277.5330.1294
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Bipolar Changes in Atmospheric Circulation During the Little Ice Age

K. J. Kreutz, * P. A. Mayewski, L. D. Meeker, M. S. Twickler, S. I. Whitlow, I. I. Pittalwala

Annually dated ice cores from Siple Dome, West Antarctica, and central Greenland indicate that meridional atmospheric circulation intensity increased in the polar South Pacific and North Atlantic at the beginning (~1400 A.D.) of the most recent Holocene rapid climate change event, the Little Ice Age (LIA). As deduced from chemical concentrations at these core sites, the LIA was characterized by substantial meridional circulation strength variability, and this variability persists today despite strong evidence for an end to LIA cooling. Thus, increased late 20th century storm variability may be in part a result of the continuation of these climatic fluctuations.

K. J. Kreutz and P. A. Mayewski, Climate Change Research Center, Institute for the Study of Earth, Oceans, and Space and Department of Earth Sciences, University of New Hampshire, Durham, NH 03824, USA.
L. D. Meeker, Climate Change Research Center, Institute for the Study of Earth, Oceans, and Space, and Department of Mathematics, University of New Hampshire, Durham, NH 03824, USA.
M. S. Twickler, S. I. Whitlow, I. I. Pittalwala, Climate Change Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, USA.
*   To whom correspondence should be addressed. E-mail: karl.kreutz{at}unh.edu

Volume 277, Number 5330, Issue of 29 August 1997, pp. 1294-1296
©1997 by The American Association for the Advancement of Science.

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