A warming climate is expected to melt large portions of the Greenland and Antarctic ice sheets, contributing to sea-level rise. However, since the behavior of melting ice sheets is poorly known, estimating how soon major changes will occur is difficult. To help predict these impacts, a team of researchers have used a series of modeling experiments to gain insights into a key factor in ice sheet melting. a few extra words. a few more words to make it go almost to the end.