Learn about the Greenland ice sheet, a frozen, forgotten land, in a lecture by glaciologist Kristin Poinar.
The Greenland ice sheet is massive, mysterious – and melting. Hidden beneath its surface is a vast aquifer that holds a Lake Tahoe-sized volume of water from the summer melt. Poinar's team is investigating the fate of this water. Does it stay put, or does it find its way out to the ocean and contribute to global sea level rise?