If it's warm enough to melt the ice above it, it could be enabling the ice to slide more rapidly out to sea.
Geophysical Research Letters argues there must be an underground source of heat for liquid water to exist underneath the polar ice cap.
Or it's #CO2 from Earth.
Geothermal hot springs have been discovered all over Earth’s largest island.
This heat cannot be directly measured in ice sheets because the bedrock is inaccessible.