Has the "Hockey Stick" Been Disproven? Part 3 - North and Wegman Reports
Hockey Sticks Featured in the North Report In two previous posts ( here and here ), I described the challenges by McIntyre and McKitrick (M&M) to the initial two hockey stick papers published by Mann, Bradley and Hughes (MBH98 and MBH99). In these posts I summarized M&M's multiple critiques of the MBH hockey stick papers, essentially that the "hockey stick" is an artifact of flaws in the MBH statistical method and an over reliance on one set of North American tree ring proxies. However, multiple peer-reviewed papers following M&M's criticism generally found that M&M's criticisms lacked merit and vindicated the MBH hockey stick reconstruction. To summarize: 1. Biases associated with MBH's statistical method were small and contributed very little to the shape of the MBH hockey stick reconstruction. Biases associated with M&M's statistical method went in the opposite direction, and M&M exaggerated the effect of statistical bias on the...