Arctic Tipping Point: A North Pole Without Ice

Yale Environment 360: As the northern summer draws to a close, two milestones have been reached in the Arctic Ocean -- record-low sea ice extent, and an even more dramatic new low in Arctic sea ice volume. This extreme melting offers dramatic evidence, many scientists say, that the region’s sea ice has passed a tipping point and that sometime in the next decade or two the North Pole will be largely ice-free in summer. NASA and U.S. ice experts announced earlier this week that the extent of Arctic sea ice has dropped......

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