Previously, only a handful of lakes locked beneath the ice had been identified.
The arch that connects Greenland and Ellesmere Island normally breaks up in June or July.
Researchers ran hundreds of simulations for different climate scenarios to see how the ice will respond in the coming centuries.
As the Earth's climate warms, melting ice sheets are expected to lead to an increase in global sea levels.
Last November, researchers announced that the discovery of another large impact crater below Greenland's ice, just over 100 miles away.
"There are 180 inhabitants, and we are very concerned and afraid," one resident said.
This heat source is found all over the planet and is extremely difficult to measure.
The acceleration is driven by expansion of water and melting ice sheets.
Scottish government will table plans this week.
Nicola Sturgeon may have to take Scottish independence off the table to get a deal with the EU.
One of the most important ocean current systems could be slowing down, according to a new study.