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