Why is Greenland’s ice sheet melting more than Antarctica?

Every centimeter of sea level rise leads to coastal flooding and coastal erosion, disrupting people's lives around the planet," said Shepherd. As to what is leading to the ice loss, Antarctica's outlet glaciers are being melted by the ocean, which causes them to speed up.

Explanation:

An increased rate of mass loss results in a faster rise in the global mean sea level.  Owing to gravitational forces, the melting of the Antarctic ice sheet contributes more to sea level rise in the northern hemisphere than the melting of the Greenland ice sheet.