Von Storch et al. [2004] argued that the reduced variability of MBH and Jones et al [1998] was possibly due to the use of inverse regression. This hypothesis has received a fair of attention as a rival candidate for the microscopic honor of breaking the hockey stick. I obviously think that our analysis in terms […]
In response to the high-variability recosntruction of Esper et al. [2002] posted up here , Mann and Hughes [Science 296, 848 (2002)] replied: The basis used by Esper et al. for comparison with previous studies of NH temperature trends over the past millennium is flawed [imagine Mann calling someone else’s work "flawed"] … Some of […]
In August 2005, the new editor-in-chief of GRL, Jay Famiglietti of UC, Irvine, took over control of our file after two comments, including one by Ammann (UCAR) and Wahl had been rejected by the previous editor. This is discussed here . He gave an interview to Environmental Science & Technology here in which he was […]
TCO has inquired about whether there is a legitimate purpose for using off-center PCs. I can’t think of any valid purpose. Here’s a good reason why not from our E&E article, where we showed how the MBH algorithm turned series upside down if it improved the hockey stick fit. Here’s how we wrote it up.
A number of people are citing the von Storch and Zorita paper as somehow showing that the erroneous MBH98 method did not "matter". I stated previously that the VZ paper indicated that they had inaccurately replicated the hockey stick algorithm – which made their results irrelevant. I have since had some correspondence with von Storch, […]
Roger Pielke notes that the hockey stick debate has been widely discussed and has issued a challenge to Mann and myself to summarize why the hockey stick debate should matter to anyone. A fair question. He characterizes the latest exchanges over realclimate posting policy in very unflattering terms to all parties involved (including myself). While […]
It looks like there is a huge cock-up in the von Storch and Zorita Comment, which completely screws up their simulations. We alluded to a defect in their methodology in our Reply, but I didn’t realize just how big a defect it was.
The von Storch and Zorita Comment and the Huybers Comment, together with our replies, were published by GRL this week. I previously posted up on VZ here and on Huybers here, here and here and have nothing to add at this time. Original copies of VZ is here; our Reply is here; Huybers’ comment is […]
I previously posted up two comments on our Reply to Huybers here and here, the first of which contained some new material. Here’s the third and final instalment, discussing Huybers’ comments on principal components. While principal components were really only one aspect of our critique, the reaction of the Hockey Team and the “community” to […]
A few weeks ago, I mentioned here that the new editor-in-chief of GRL, Jay Famiglietti, had removed James Saiers as our editor, had made remarks about our papers to Environmental Science & Technology that can be construed as critical, had pulled two rejected Comments out of the garbage can (including one that had been press […]
Climate Audit 
Some more on von Storch and Zorita
A number of people are citing the von Storch and Zorita paper as somehow showing that the erroneous MBH98 method did not "matter". I stated previously that the VZ paper indicated that they had inaccurately replicated the hockey stick algorithm – which made their results irrelevant. I have since had some correspondence with von Storch, […]