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Waterfall at the Glacier Front of the Greenland Ice Sheet, near Olrik Fjord, North-West Greenland
The Greenland Ice Sheet, the second largest ice mass in the world, consisting of layers of compressed snow from more than 100,000 years, contains in its ice today's most valuable record of past climates. The Greenland Ice Sheet has experienced record melting in recent years and is likely to contribute substantially to sea level rise as well as to possible changes in ocean circulation in the future.