Top Scientist — Threat of Catastrophic Permafrost Thaw is “Real and Imminent”

Unmeasured dangers rising up and still nothing effective from our governments. More members of the U. S. House and Senate need to speak up and add weight to the President’s calls for action.

robertscribbler

There’s a lot of carbon stored in the Arctic’s thawing permafrost. According to our best estimates, it’s in the range of 1,300 billion tons (see Climate Change and the Permafrost Feedback). That’s more than twice the amount of carbon already emitted by fossil fuels globally since the 1880s. And the sad irony is that continuing to burn fossil fuels risks passing a tipping point beyond which rapid destabilization and release of those carbon stores becomes locked in.

permafrost_map

(Global permafrost coverage as recorded by the World Meteorological Organization. A 2 C global warming threshold is generally thought to be the point at which enough of the Arctic permafrost will go into catastrophic destabilization, to result in a global warming amplifying feedback that then thaws all or most of the rest. The 2 C threshold was chosen because it is the bottom boundary of the Pliocene — a time when this…

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