Steve McIntyre writes: in Mann Misrepresents the EPA – Part 1:
In today’s post, I will return to my series on false claims in Mann’s lawsuit about supposed “exonerations”. ( For previous articles, see here ^). One of the most important misconduct allegations against Mann – the “amputation” of the Briffa reconstruction in IPCC TAR – was discussed recently by Judy Curry, who, in turn, covered Congressional testimony on the incident by John Christy, who had been a Lead Author of the same IPCC TAR chapter and whose recollections of the incident were both first-hand and vivid.
In one of the major graphics in the IPCC 2001 report, declining values of the Briffa reconstruction were deleted (“amputated” is Christy’s apt term), resulting in the figure giving a much greater rhetorical impression of consistency than really existed. This truncation of data had been known (and severely criticized) at Climate Audit long before Climategate. However, the incident came into an entirely new light with the release of the Climategate emails, which showed that senior IPCC officials had been concerned that the Briffa reconstruction (with its late 20th century decline) would “dilute the message” and that Mann was equally worried that showing the Briffa reconstruction would give “fodder to the skeptics”.
Christy gave the following damning summary of Mann’s conduct as IPCC TAR Lead Author:
Regarding the Hockey Stick of IPCC 2001 evidence now indicates, in my view, that an IPCC Lead Author working with a small cohort of scientists, misrepresented the temperature record of the past 1000 years by (a) promoting his own result as the best estimate, (b) neglecting studies that contradicted his, and (c) amputating another’s result so as to eliminate conflicting data and limit any serious attempt to expose the real uncertainties of these data.
Christy left out a further fundamental problem in the amputation: there was no disclosure of the amputation in the IPCC 2001 report itself.
The impropriety of deleting adverse data in an IPCC graphic was easily understood in the broader world of brokers, accountants, lawyers and fund managers and one on which there was negligible sympathy for excuses. Not only did this appear to be misconduct as far as the public was concerned, the deletion of adverse data in the IPCC graphic appeared to be an act of “omitting data or results such that the research is not accurately represented in the research record” – one of the definitions (“falsification”) of academic misconduct in the NSF and other academic misconduct codes.
Further, both the Oxburgh and Muir Russell reports concluded that the IPCC 2001 graphic was “misleading”.
However, NONE of the inquiries conducted an investigation of the incident. Each, in turn, ignored or evaded the incident. I’ll examine the evasions in today’s post. Today’s post will open consideration of the EPA documents referred to in Mann’s pleadings, a topic that is not easily summarized. Today’s discussion of the EPA documents will only be a first bite.
Read the full essay here, well worth your time: http://climateaudit.org/2014/05/09/mann-misrepresents-the-epa-part-1/