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Simulating Arctic Climate Warmth and Icefield Retreat in the Last Interglaciation

Science
24 Mar 2006
Vol 311, Issue 5768
pp. 1751-1753

Abstract

In the future, Arctic warming and the melting of polar glaciers will be considerable, but the magnitude of both is uncertain. We used a global climate model, a dynamic ice sheet model, and paleoclimatic data to evaluate Northern Hemisphere high-latitude warming and its impact on Arctic icefields during the Last Interglaciation. Our simulated climate matches paleoclimatic observations of past warming, and the combination of physically based climate and ice-sheet modeling with ice-core constraints indicate that the Greenland Ice Sheet and other circum-Arctic ice fields likely contributed 2.2 to 3.4 meters of sea-level rise during the Last Interglaciation.

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Supplementary Material

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References and Notes

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Circum-Arctic PaleoEnvironments (CAPE) is a program within the International Geosphere-Biosphere Program (IGBP)–Past Global Changes (PAGES); the CAPE-LIG compilation was supported by the NSF–Office of Polar Programs–Arctic System Science (PARCS) and PAGES. The CAPE Last Interglacial Project Members are P. Anderson, O. Bennike, N. Bigelow, J. Brigham-Grette, M. Duvall, M. Edwards, B. Fréchette, S. Funder, S. Johnsen, J. Knies, R. Koerner, A. Lozhkin, G. MacDonald, S. Marshall, J. Matthiessen, G. Miller, M. Montoya, D. Muhs, B. Otto-Bliesner, J. Overpeck, N. Reeh, H. P. Sejrup, C. Turner, and A. Velichko. We thank E. Brady and D. Schimel for helpful discussions; R. Tomas and M. Stevens for figures; and C. Shields for design and running of the simulations. We acknowledge the efforts of a large group of scientists at the NCAR, at several Department of Energy and National Oceanic and Atmospheric Administration labs, and at universities across the United States who contributed to the development of CCSM2. Computing was done at NCAR as part of the Climate Simulation Laboratory. Funding for NCAR and this research was provided by NSF.

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Published In

Science
Volume 311 | Issue 5768
24 March 2006

Submission history

Received: 30 September 2005
Accepted: 1 March 2006
Published in print: 24 March 2006

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Notes

Supporting Online Material
www.sciencemag.org/cgi/content/full/311/5768/1751/DC1
Materials and Methods
Figs. S1 to S4
References

Authors

Affiliations

Bette L. Otto-Bliesner* [email protected]
Climate and Global Dynamics Division, National Center for Atmospheric Research (NCAR), Boulder, CO 80305, USA.
Shawn J. Marshall
Department of Geography, University of Calgary, Calgary, Alberta, T2N 1N4, Canada.
Jonathan T. Overpeck
Institute for the Study of Planet Earth, Department of Geosciences, and Department of Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, USA.
Gifford H. Miller
Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, Boulder, CO 80309, USA.
Aixue Hu
Climate and Global Dynamics Division, National Center for Atmospheric Research (NCAR), Boulder, CO 80305, USA.
CAPE Last Interglacial Project members

Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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