Paleoclimatic Evidence for Future Ice-Sheet Instability and Rapid Sea-Level Rise

@article{Overpeck2006PaleoclimaticEF,
  title={Paleoclimatic Evidence for Future Ice-Sheet Instability and Rapid Sea-Level Rise},
  author={J. Overpeck and B. Otto‐Bliesner and G. Miller and D. Muhs and R. Alley and J. Kiehl},
  journal={Science},
  year={2006},
  volume={311},
  pages={1747 - 1750}
}
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… Expand
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    References

    SHOWING 1-10 OF 72 REFERENCES
    Ice-Sheet and Sea-Level Changes
    TLDR
    Observational and modeling advances have reduced many uncertainties related to ice-sheets behavior, but recently detected, rapid ice-marginal changes contributing to sea-level rise may indicate greater ice-sheet sensitivity to warming than previously considered. Expand
    Climatology: Threatened loss of the Greenland ice-sheet
    TLDR
    It is shown here that concentrations of greenhouse gases will probably have reached levels before the year 2100 that are sufficient to raise the temperature past this warming threshold. Expand
    Simulating Arctic Climate Warmth and Icefield Retreat in the Last Interglaciation
    TLDR
    The authors' 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. Expand
    Pleistocene collapse of the west antarctic ice sheet
    TLDR
    The occurrence of young diatoms and high concentrations of beryllium-10 beneath grounded ice indicates that the Ross Embayment was an open marine environment after a late Pleistocene collapse of the marine ice sheet. Expand
    Past and Future Grounding-Line Retreat of the West Antarctic Ice Sheet.
    TLDR
    Current grounding-line retreat may reflect ongoing ice recession that has been under way since the early Holocene, and if so, the WAIS could continue to retreat even in the absence of further external forcing. Expand
    Snowfall-Driven Growth in East Antarctic Ice Sheet Mitigates Recent Sea-Level Rise
    TLDR
    Satellite radar altimetry measurements indicate that the East Antarctic ice-sheet interior north of 81.6°S increased in mass by 45 ± 7 billion metric tons per year from 1992 to 2003, enough to slow sea-level rise by 0.12 ± 0.02 millimeters per year. Expand
    Substantial contribution to sea-level rise during the last interglacial from the Greenland ice sheet
    TLDR
    It is concluded that the high sea level during the last interglacial period most probably included a large contribution from Greenland meltwater and therefore should not be interpreted as evidence for a significant reduction of the West Antarctic ice sheet. Expand
    Warm ocean is eroding West Antarctic Ice Sheet
    [1] Satellite radar measurements show that ice shelves in Pine Island Bay have thinned by up to 5.5 m yr−1 over the past decade. The pattern of shelf thinning mirrors that of their grounded… Expand
    Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge
    THE timing of the last deglaciation is important to our understanding of the dynamics of large ice sheets1 and their effects on the Earth's surface2,3. Moreover, the disappearance of the glacial ice… Expand
    Surface Melt-Induced Acceleration of Greenland Ice-Sheet Flow
    TLDR
    The near coincidence of the ice acceleration with the duration of surface melting, followed by deceleration after the melting ceases, indicates that glacial sliding is enhanced by rapid migration of surface meltwater to the ice-bedrock interface. Expand
    ...
    1
    2
    3
    4
    5
    ...