The Greenland ice sheet covers roughly 85% of the land surface of the
island and rises to an average height of 2.3 km (1.6 miles). The immense
weight of the ice sheet has pushed the center of the island roughly 300
meters (1000 ft) below sea level. The icy expanse of Greenland, like
the rest of the Arctic, not only represents an important climatological
indicator, it
also is critical to future
global climate. Were all of Greenland's ice to melt, global sea level
would rise 7 meters (23 feet). Greenland's ice sheet is slowly melting
due to warming temperatures, and there is great concern that this
melting will accelerate and contribute to sea level rise of several feet
later this century.
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