Raymond T. Pierrehumbert is the Louis Block Professor in the Geophysical Sciences at the University of Chicago, where he has taught and undertaken research on a wide variety of Earth and planetary climate problems for over twenty years. He shared in the Nobel Peace Prize as a lead author of the Intergovernmental Panel on Climate Change Third Assessment Report. He co-authored the U.S. National Research Council report on Abrupt Climate Change, and is currently on the National Research Council panel on CO2 stabilization targets, as well as being a member of their Board on Atmospheric Science and Climate. He has been a John Simon Guggenheim Fellow, is a Fellow of the American Geophysical Union, and was named Chevalier de l'Ordre des Palmes Academiques by the Republic of France. In addition to his research on planetary climate, he writes regularly for the popular RealClimate.org climate science blog.