Is the surface snow melting more often at Summit Station? Insights from the NSF-funded ICECAPS project.
In the early 1990s, the Greenland Ice Sheet Project (GISP-2) drilled a deep ice core at Summit Station that was over 3000 meters. This ice core revealed clues of past climate of both the Arctic region and the entire Earth. One analysis examined the ice core for particular layers that signified when the surface snow at Summit had melted. The result was that these “melt events” are rare. In fact, only about 50 melt events have occurred at Summit in the past 10,000 years. And over the past 3000 years, they have only occurred once in roughly every 250 years.