Uncertainty in the IPCC's Third Assessment Report

Projections of future climate change are uncertain. On the basis of the recent IPCC report, [ Reilly et al .][1] and [ Allen et al .][2] discuss approaches to and problems in quantifying uncertainty in future climate assessments. See also the Research Article by Wigley and Raper (p. [451][3]). [1]: http://www.sciencemag.org/cgi/content/full/293/5529/430a [2]: http://www.sciencemag.org/cgi/content/full/293/5529/430b [3]: http://www.sciencemag.org/cgi/content/short/293/5529/451