Maybe the methane is the reason the ice is ‘receding’ in that area rather than a byproduct of it?
How do they know the methane hasn’t been bubbling up before?
They don’t.
I have a circa 1850 book about the oceans and methane and the stuff getting into the atmosphere. It is far from new. What is new is the guesstimatess of what should be. And the concept of knowing the amount of methane as related to the universe is an absurdity.
Some suspect it has
Read about “The Great Dying”
The globull warmists will want to say the methane release is caused by globull warming, but perhaps ancient history will show it was the other way around
http://www.sciencedaily.com/releases/2003/08/030828071722.htm
http://geology.gsapubs.org/content/31/9/741
http://www.sciencedaily.com/releases/2007/10/071025091047.htm