William Richard Peltier, Ph.D., D.Sc. (hc) [1](born 1943), is a university professor of physics at the University of Toronto. He is director of the Centre for Global Change Science [2] principal investigator of the Polar Climate Stability Network [3] and the Scientific Director of Canada's largest supercomputer centre, SciNet[4] He is a fellow of the Royal Society of Canada and of the American Geophysical Union.