Dr. Richard Alley will present “As the Tide Rises: Decades of Watching Ice Sheets Change.” Dr. Alley is an Evan Paugh University professor of geosciences at Penn State. He studies the great ice sheets to help predict future changes in climate and sea level, and has conducted field research in Antarctica, Greenland and Alaska. Dr. Alley participated in the United Nations Intergovernmental Panel on Climate Change and is a co-recipient of the 2007 Nobel Peace Prize. He has authored multiple books, including “Earth: The Operators Manual,” and hosted a special public television event based on the same title.