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Melting Permafrost Threatens To Unleash Dangerous Climate Feedback #auspol

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Earth’s melting permafrost threatens to unleash a dangerous climate feedback loopNew permafrost study underscores the critical importance of ambitious climate targets, like the Paris agreement.

By Dr Joe Romm

In this so-called “drunken forest,” in Alaska, the trees tilt because the once-frozen ground (permafrost) is thawing. CREDIT: NSIDC.

Global warming will defrost much more permafrost than we thought, a new study finds. Every 1°C (1.8°F) of additional warming would thaw one-quarter of the earth’s frozen tundra area — releasing staggering amounts of heat-trapping greenhouse gases (GHGs).

Those GHGs would in turn warm the planet more, melting more permafrost, releasing more GHGs, and so on. This is perhaps the most dangerous amplifying carbon-cycle feedback humanity faces — considering permafrost contains twice as much carbon as the atmosphere does today.

That’s why it’s so vital the U.S. adheres to its commitments in the 2015 Paris climate agreement — a landmark accord in which the world unanimously committed to…

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April 11, 2017 - Posted by | Uncategorized

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