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Climate change

The 20-year forecast

Policy-makers need short-term climate predictions to develop strategies for coping with climate change over the typical two-decade planning horizon. Two new studies increase our confidence in these predictions.

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Figure 1: A warmer world. Shown here are projected changes in surface air temperature, relative to 1990–2000, for the decade 2020–30.


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

  2. Levitus, S. et al. Science 292, 267–270 (2001).

    ADS  CAS  Article  Google Scholar 

  3. Knutti, R., Stocker, T. F., Joos, F. & Plattner, G.-K Nature 416, 719–723 (2002).

    ADS  CAS  Article  Google Scholar 

  4. Stott, P. A. & Kettleborough, J. A. Nature 416, 723–726 (2002).

    ADS  CAS  Article  Google Scholar 

  5. Wigley, T. M. L. & Raper, S. C. B. Science 293, 451–454 (2001).

    ADS  CAS  Article  Google Scholar 

  6. Allen, M. R., Stott, P. A., Schnur, R., Delworth, T. & Mitchell, J. F. B. Nature 407, 617–620 (2000).

    ADS  CAS  Article  Google Scholar 

  7. Tett, S. F. B., Stott, P. A., Allen, M. R., Ingram, W. J. & Mitchell, J. F. B. Nature 399, 569–572 (1999).

    ADS  CAS  Article  Google Scholar 

  8. Stott, P. A. et al. Clim. Dyn. 17, 1–21 (2001).

    CAS  Article  Google Scholar 

  9. Claussen, M. et al. Clim. Dyn. 18, 579–586 (2002).

    Article  Google Scholar 

  10. Forest, C. E., Stone, P. H., Sokolov, A. P., Allen, M. R. & Webster, M. D. Science 295, 113–117 (2002).

    ADS  CAS  Article  Google Scholar 

  11. Andronova, N. & Schlesinger, M. E. J. Geophys. Res. 106, 22605–22612 (2001).

    ADS  Article  Google Scholar 

  12. Nakicenovic, N. & Swart, R. Special Report on Emissions Scenarios (Cambridge Univ. Press, 2000).

  13. Cox, P. N., Betts, R. A., Jones, C. D., Spall, S. A. & Totterdell, I. J. Nature 408, 184–187 (2000).

    ADS  CAS  Article  Google Scholar 

  14. Broecker, W. S. Science 278, 1582–1588 (1997).

    ADS  CAS  Article  Google Scholar 

  15. Flato, G. M. & Boer, G. J. B. Geophys. Res. Lett. 28, 195–198 (2001).

    ADS  Article  Google Scholar 

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Correspondence to Francis W. Zwiers.

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Zwiers, F. The 20-year forecast. Nature 416, 690–691 (2002).

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