At virtually the same time NASA's Goddard Institute for Space Studies was correcting historical climate data with the assistance of Climate Audit's Steve McIntyre, a British mathematician discovered serious flaws in papers used and cited by the United Nations' Intergovernmental Panel on Climate Change in its most recent Assessment Report.

Douglas J. Keenan, a former Morgan Stanley arbitrageur and current independent mathematical researcher, identified "fabrications" in such studies that suggest a "marked lack of integrity in some important work on global warming that is relied upon by the IPCC" and that "the insignificance of urbanization effects on temperature measurements has not been established as reliably as the IPCC assessment report assumes."

As Keenan stated in his full report concerning this matter (emphasis added throughout):