Location: Simons IMAX Theatre
Big Ice: Antarctica, Greenland, and Boston
Dr. Richard Alley Evan, Pugh Professor of Geosciences in Penn State’s College of Earth and Mineral Sciences
An ice sheet is a two-mile-thick, continent-wide pile of old snow, spreading under its own weight and sculpting the land beneath. The ice sheet that buried Boston 20,000 years ago melted when slowly acting features of Earth’s orbit raised summer sunshine and atmospheric carbon dioxide, warming the climate. The history of that Ice Age can still be read in Boston Harbor and in the layers of the surviving ice sheets on Antarctica and Greenland. Join Dr. Richard Alley to learn how more warming may melt those ice records, as break-off of huge icebergs and outburst floods speed sea-level rise.