Paleoclimatic evidence for future ice-sheet instability and rapid sea-level rise.
Sea-level rise from melting of polar ice sheets is one of the largest potential threats of future climate change. Polar warming by the year 2100 may reach levels similar to those of 130,000 to 127,000 years ago that were associated with sea levels several meters above modern levels; both the Greenland Ice Sheet and portions of the Antarctic Ice Sheet may be vulnerable. The record of past ice-sheet melting indicates that the rate of future melting and related sea-level rise could be faster than widely thought.
Institute for the Study of Planet Earth, Department of Geosciences, and Department of Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, USA. jto@u.arizona.edu
Jonathan T
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Overpeck
Bette L
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Otto-Bliesner
Gifford H
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Miller
Daniel R
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Muhs
Richard B
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Alley
Jeffrey T
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Kiehl