Evan Pugh Professor, Department of Geosciences, and Earth and Environmental Systems Institute, Pennsylvania State University Dr. Alley is a geologist who studies the great ice sheets to aid in prediction of future changes in climate and sea level. He has conducted field seasons in Antarctica, Greenland, and Alaska. He has served on many advisory panels, including having chaired the U.S. National Research Council’s Panel on Abrupt Climate Change and participated in the United Nations Intergovernmental Panel on Climate Change, which was co-recipient of the 2007 Nobel Peace Prize. He has provided requested advice to numerous government officials. He is a member of the U.S. National Academy of Sciences and has been honored for his research, teaching, and public service by the American Geophysical Union, the Geological Society of America, and the International Glaciological Society, among others. He is host of a PBS television documentary on climate and energy, Earth: The Operators’ Manual.