Arctic thaw may be at “tipping point”

via: Reuters

OSLO (Reuters) – A record melt of Arctic summer sea ice this month may be a sign that global warming is reaching a critical trigger point that could accelerate the northern thaw, some scientists say.

“The reason so much (of the Arctic ice) went suddenly is that it is hitting a tipping point that we have been warning about for the past few years,” James Hansen, director of NASA’s Goddard Institute for Space Studies, told Reuters.

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