Pennsylvania State University announced in December 2009 it would review the work of Michael Mann, in particular looking at anything that had not already been addressed in an earlier
review by the National Research Council of the
National Academy of Sciences which had found some faults with his methodology but agreed with the results.
[98][99][100] In response, Mann said he would welcome the review.
[100] The inquiry committee determined on 3 February 2010 that there was no credible evidence Mann suppressed or falsified data, destroyed emails, information and/or data related to the
IPCC Fourth Assessment Report, or misused privileged or confidential information. The committee did not make a definitive finding on the final point of inquiry — "whether Dr. Mann seriously deviated from accepted practices within the academic community for proposing, conducting, or reporting research or other scholarly activities". The committee said that the earlier NAS inquiry had found "that Dr. Mann’s science did fall well within the bounds of accepted practice", but in light of the newly available information this question of conduct was to be investigated by a second panel of five prominent Penn State scientists from other scientific disciplines.
[36][101]
The second Investigatory Committee reported on 4 June 2010 that it had "determined that Dr. Michael E. Mann did not engage in, nor did he participate in, directly or indirectly, any actions that seriously deviated from accepted practices within the academic community." Regarding his sharing unpublished manuscripts with colleagues on the assumption of implied consent, it considered such sharing to be "careless and inappropriate" without following the best practice of getting express consent from the authors in advance, though expert opinion on this varied. It said that his success in proposing research and obtaining funding for it, commenting that this "clearly places Dr. Mann among the most respected scientists in his field. Such success would not have been possible had he not met or exceeded the highest standards of his profession for proposing research." Mann's extensive recognitions within the research community demonstrated that "his scientific work, especially the conduct of his research, has from the beginning of his career been judged to be outstanding by a broad spectrum of scientists." It agreed unanimously that "there is no substance" to the allegations against Mann.
[102][103]
Mann said he regretted not objecting to a suggestion from Jones in a 29 May 2008 message that he destroy emails. "I wish in retrospect I had told him, 'Hey, you shouldn't even be thinking about this,'" Mann said in March 2010. "I didn't think it was an appropriate request." Mann's response to Jones at the time was that he would pass on the request to another scientist. "The important thing is, I didn't delete any emails. And I don't think [Jones] did either."
[104]
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