The country's southeast and northwest regions, where large glaciers send chunks of ice into the Atlantic ocean, were previously the main concern for researchers. One example is the pace at which sea levels are rising in the Earth's polar regions.
The Bevis led study, published Monday in the Proceedings of the National Academy of Sciences, analysed Global Positioning System data from Greenland's coast to more precisely understand previous research from a joint project between NASA and the German Aerospace Center. This means the melting happened from surface ice mass, inland from the coastline, the authors found.
"We knew we had one big problem with increasing rates of ice discharge by some large outlet glaciers".
He said the findings may have "serious implications" for major USA cities such as NY and Miami, as well as island nations particularly vulnerable to flooding.
And there is no turning back, Bevis said.
"This is going to cause additional sea level rise".
NASA said: "Data from the GRACE satellites show that ice sheets in both Antarctica and Greenland are losing mass". That amount of ice was enough to raise the global sea level by 0.03 inches a year. Then the NAO went briefly and dramatically positive, coinciding with the ice loss pause, before dipping negative again. "But if you take ice mass off of Greenland and put it directly into the sea at a faster rate than anyone is modeling, that would imply that sea-level projections are maybe a little conservative", said Kaitlin Keegan, a Dartmouth research associate.
The reason for this is the bad impact of humanity on the Earth leading to an acceleration of warming in the atmosphere.
Prof. Bevis and his co-authors said they believe the melting ice sheet is mainly caused by global warming.
"These oscillations have been happening forever". Known about the so-called North Atlantic oscillation, a weather phenomenon that brings warm air to Greenland. Because of climate change, the base temperature is already close to the critical temperature at which coral bleaches, so an El Niño pushes the temperature over the critical threshold value.
NAO has a great influence on sea surface temperature and can cause massive net ice loss when combined with the global atmospheric warming. While glaciers are smaller streams of ice that creep over the landscape and can break apart and liquefy from warm ocean water, the actual enormous ice sheet was believed to be more resistant to that kind of melt.
According to Professor Bevis, the new findings indicate that scientists may not have been watching the right parts of the island to detect where potential sea-level rise would come from.
"We're going to see faster and faster sea level rise for the foreseeable future", Bevis said. You never got four or five years of major melting like this in the 1900s.