Laurence I. Gould, PhD, Physics Department, University of Hartford
"The mean, with respect to which the temperature “anomaly” (difference between the mean and a particular temperature value) is measured, appears to be taken over a period so as to magnify that anomaly. The mean is taken from 1961 – 1990, an interval of 28 years. But there was a global cooling from about 1940 to 1975. Thus, over the years 1961 – 1975, or 50% of the time over which the mean was chosen, there was a global cooling!"