Greenland Ice Sheet is sliding more than anyone realized, impacting sea level rise!

Researchers from the universities of Wyoming and Montana discovered that the Greenland ice sheet slides more than previously thought, even in winter when no meltwater is present. This movement impacts sea level rise. The team used 212 tilt sensors in boreholes to study changes in the ice sheet's shape and movement, aiming to improve ice sheet models for predicting future ice loss.

Why is the presence of melt water significant for the sliding of the ice sheet?

What are the researchers hoping to achieve by improving ice sheet models?