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Cooling a continent

The effect of greenhouse gases on climate is underscored by modelling work showing that formation of the Antarctic ice sheet, 34 million years ago, occurred largely because of a fall in atmospheric CO2 concentration.

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Figure 1: Decline in average global temperature over the past 80 million years of Earth's history.


  1. Barrett, P. J. Terra Antartica 3, 103–119 (1996).

    Google Scholar 

  2. DeConto, R. M. & Pollard, D. Nature 421, 245–249 (2003).

    Article  ADS  CAS  Google Scholar 

  3. Shackleton, N. J. & Kennett, J. P. Init. Rep. Deep Sea Drilling Project 29, 743–755 (1975).

    CAS  Google Scholar 

  4. Crowley, T. J. & Kim, K.-Y Geophys. Res. Lett. 22, 933–936 (1995).

    Article  ADS  CAS  Google Scholar 

  5. Kennett, J. P. J. Geophys. Res. 82, 3843–3859 (1977).

    Article  ADS  CAS  Google Scholar 

  6. Sloan, L. C., Walker, J. C. G. & Moore, T. C. Jr Paleoceanography 10, 347–356 (1995).

    Article  ADS  CAS  Google Scholar 

  7. Naish, T. R. et al. Nature 413, 719–723 (2001).

    Article  ADS  CAS  Google Scholar 



  10. Miller, K. G., Wright, J. D. & Fairbanks, R. G. J. Geophys. Res. 96, 6829–6848 (1991).

    Article  ADS  Google Scholar 

  11. Raine, J. I. & Askin, R. A. Terra Antartica 8, 389–400 (2001).

    Google Scholar 

  12. Wilson, G. S. et al. Palaeogeogr. Palaeoclimatol. Palaeoecol. 179, 1–15 (2002).

    Article  Google Scholar 

  13. Barrett, P. J., Bleakley, N. L., Dickinson, W. W., Hannah, M. H. & Harper, M. A. in The Antarctic Region: Geological Evolution and Processes (ed. Ricci, C. A.) 763–770 (Terrapub, Siena, 1997).

    Google Scholar 

  14. Houghton, J. T. et al. Climate Change 2001: The Scientific Basis (Cambridge Univ. Press, 2001).

    Google Scholar 


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Correspondence to Peter Barrett.

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Barrett, P. Cooling a continent. Nature 421, 221–223 (2003).

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