"Ice sheet" refers to a large mass of frozen water that covers a vast area of land, similar to a blanket of ice. It is like a very thick layer of ice that can be found in polar regions, such as Antarctica and Greenland. Full definition
So researchers need to look elsewhere for clues of ice sheet melt in the more distant past. (carbonbrief.org)
Worst case scenarios of ice sheet melting and sliding lead to estimates of sea - level rise of the worrying 4 to 6 m. (sciencedaily.com)
The shallow curve for the pace at which seas will rise reflects the persistent questions surrounding the behavior of ice sheets in a warming climate. (dotearth.blogs.nytimes.com)