The M&M Expose, 2003

Steve McIntyre (Toronto) and Ross McKitrick (Univ. of Guelph)
  • 1998, MBH published in Nature
    Michael E. Mann, R.S. Bradley, and M.K. Hughes
    California temperatures for the past 1000 years from tree rings of a single tree
  • 2003, M&M citique published in Energy and Environment
    The MBH data does not produce the hockey stick ...
    "due to collation errors, unjustifiable truncation or extrapolation of source data, obsolete data, geographical location errors, incorrect calculation of principle components and other quality control defects."

  • Last revised by Ralph Abraham