PAGES2K Non-Corrigendum, Which Way is Up? – Disingenuousness or Defective Thinking in Climate Science?

Don't fall behind the power curve    [atani studios ccsa 3.0]

Don’t fall behind the power curve                                                                [atani studios ccsa 3.0]

This is yet another blog article that fell by the wayside as other projects took over, but I had put too much effort into it already to abandon it completely.  So, here it is even if it may no longer be quite as interesting as it might have been a couple of weeks ago – but hopefully still somewhat relevant – or maybe its the other way around.

Over at Steve McIntyre’s Climate Audit, the topic of discussion has moved away from the parsing of the Michael Mann defamation suite and the shenanigans of blog commenter Nick Stokes towards a multi-part discussion of the publication of the recent “non-corrigendum” by the  PAGES2K Arctic Workingroup of a significant revisions to their  PAGES2K Arctic database of paleoclimate data.  The series started with McIntyre’s Revisions to Pages2K Arctic back on October 1st.

The original version of this particular product of the PAGES Consortium had garnered strong criticism at Climate Audit in the past particularly in regards to the inclusion of several contaminated lake sediment proxy series, the use [or misuse] of several series in an orientation that is either ambiguous or inverted to that used by specialists in the field, and a small laundry list of other complaints since it was first published in 2010.  McIntyre said of the publication:

Kaufman and the PAGES2K Arctic2K group recently published a series of major corrections to their database, some of which directly respond to Climate Audit criticism. The resulting reconstruction has been substantially revised with substantially increased medieval warmth. His correction of the contaminated Igaliku series is unfortunately incomplete and other defects remain.

McIntyre goes on in his ensuing series of articles to dissect in great statistical detail precisely what the remaining defects are in the PAGES2k Arctic database, why he thinks it is important that they be corrected as well, and why he thinks a formal corrigendum at the original publishing journal,, is warranted – so those errors do not remain “in play” for other scientist to use [or misuse] by continuing to cite them in future research.

All of McIntyre’s reasoning seems reasonable and correct to me – the last and least among the readers who are non-experts at CA.


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