21. Shakhova et al. (2010) estimate the accumulated methane potential for the Eastern Siberian Arctic Shelf alone as follows:
organic carbon in permafrost of about 500 Gt
about 1000 Gt in hydrate deposits
about 700 Gt in free gas beneath the gas hydrate stability zone.
Shakhova et al. (2008) consider release of up to 50 Gt of predicted amount of hydrate storage as highly possible for abrupt release at any time.
By comparison, the total amount of methane currently in the atmosphere is about 5 Gt.

33. Teplota Země za 550 milionů let

34. Stabilizace klimatu