Reply [to “Comment: Human contribution to climate change increasingly clear”]



Does the “balance of evidence suggest a discernible human influence on climate?” Until properly defined, this main conclusion of the IPCC [1996, p. 5] is not meaningful.This ambiguous phrase does not identify (using Keller's words) “a small but growing [anthropogenic] signal in a noisy chaotic climate.” Nor can it be used “to project future warming even with admittedly imperfect climate models.”