Proxy inconsistency and other problems in millennial paleoclimate reconstructions
- Stephen McIntyrea,1 and
- Ross McKitrickb
- aClimateAudit.org, 25 Playter Boulevard, Toronto, ON, Canada M4K 2W1; and
- bDepartment of Economics, University of Guelph, Guelph, ON, Canada N1G 2W1
Mann et al. (1) present two paleoclimate reconstruction methods [“error-in-variables” (EIV) and “composite plus scale” (CPS)], claiming statistically significant skill for both. Their figure 3 reveals that from approximately 750 to 1100, the CPS 95% confidence interval excludes the EIV 95% confidence interval and vice versa. This is evidence not of skill, but of inconsistency.
Contrary to …
11To whom correspondence should be addressed. E-mail: stephen.mcintyre{at}utoronto.ca
