Arctic ice caps may be more prone to melt

ClimateWire: Today, the Arctic is synonymous with "cold." But a new study suggests the polar region has experienced periods of intense warmth over the past 2.8 million years that may have been hot enough to melt the Greenland ice sheet. Scientists already knew that the Arctic is warming twice as fast as the global average. But the new study, based on a sediment core drilled from a Russian lake, suggests the far north's climate is even more sensitive than researchers suspected. "There are really big surprises......

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