What is an ice sheet? Together, the Greenland and Antarctic Ice Sheets contain more than 99 percent of the freshwater ice on Earth. An ice sheet is a mass of glacial land ice extending more than 50,000 square kilometers (20,000 square miles).…
What is an ice sheet? Together, the Greenland and Antarctic Ice Sheets contain more than 99 percent of the freshwater ice on Earth. An ice sheet is a mass of glacial land ice extending more than 50,000 square kilometers (20,000 square miles).…