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Comment by somurzakov | Hacker News Reader

wait until permafrost thawes and releases gigatonnes of methane into the air that woukd turn our planet into a large greenhouse.

from https://en.wikipedia.org/wiki/Arctic_methane_emissions : The Permian–Triassic extinction event (the Great Dying) may have been caused by release of methane from clathrates. An estimated 52% of marine genus became extinct, representing 96% of all marine species.

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Is there an estimated timeframe on approximately when this will happen?

Isn’t it already happening? Is that what is creating the huge methane explosions and craters in Siberia?

Yes. Check the Yamal Peninsula in Google Maps and you realize this kind of cratering is a process that has been going on for thousands of years (since the ice age really!).

The scary part is that it's accelerating in on a timescale that's relevant to our needs as a species.

I think the largest deposits would take thousands of years to be affected, but there are shallow deposits that could be released, especially those near glaciers, where the glacier melting allows the nearby seabed to rise.

https://en.m.wikipedia.org/wiki/Clathrate_gun_hypothesis

What kind of quantity of newly released methane are we talking about, compared to the methane produced by trees and other plants?[1]

1. https://www.npr.org/templates/story/story.php?storyId=515109...

Yeah, it's a lot. https://en.wikipedia.org/wiki/Arctic_methane_emissions