Quote:
Current average methane concentrations in the Arctic average about 1.85 parts per million, the highest in 400,000 years, said Shakhova.
Concentrations above the East Siberian Arctic Shelf are even higher, and scientists are concerned because the undersea permafrost "has been showing signs of destabilization already," she added.
"If it further destabilizes, the methane emissions... would be significantly larger."
Geological records indicate that atmospheric methane concentrations have varied between about .3 to .4 parts per million during cold periods to .6 to .7 parts per million during warm periods.
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so the levels are 3 times higher than any "warm" period over the last 400,000 years?
let me guess... that's bad
