In previous posts, I’ve observed my inability to replicate Mann’s verification statistics, the source code for which was not archived despite representations to the contrary in the original article.
Mann has issued another uninformative correction notice (bearing the date Dec 1, 2008) which states:
UPDATE 1 December 2008: Supplementary Figure S8a had a small error due to improper calculation of the validation statistics. The corrected figure can be found here (PDF)
OK, now, pretty please, what are the properly calculated validation statistics? And, pretty please, where did the error occur?
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Did you also see in the readme
***UPDATED 29 November 2008 to add
clihybrid.m to the codeprepdata directory.
Apologies – this seems to have been spotted already. Google search didn’t find the update where UC uses it
Of course, it is Figure S7a … is it so hard to get even the error notice straight? That figure is the comparison of the original CPS NH reconstruction and the one with the “potential problematic series” removed. The only way validation stats can affect that figure is through the network change issue. Comparing the original figure to the new one, that’s what seems to be going on since AD1000 step (in the “original-7” series). Notice especially the large change in AD1100 step.
How about The missing piece at the Wegman hearing?
Re: Sam Urbinto (#4),
The post deteriorated rapidly.
At least one can conclude that Mann or one of his friends is reading here regularly.
Dr. Mann seems to be trying, at least. That is a positive step. It is evident that the “forces” behind the scenes have heard Steve Mc loud and clear.
W. H. Auden (1907 – 1973) “The Dyer’s Hand,” 1963.
It is interesting to see that the proxy data indicate it was warmer in about the year 280 than in 2000. How can this be? This is not in line with the scientific concensus. The perhaps needs to be a bit more verification.
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[…] “Mann et al 2008 – Another Error Notice“, Steve McIntyre, Climate Audit, 5 December 2008 — Another correction by Mann, who seems unable to credit his critics. […]