Bull about climate warming. It takes centuries for warmth to reach ocean bottoms and then there is the pressure! PV and T? Boyle?
Useful, but ignores abiotic oil theory, that CH4 comes from earth's interior as with all planets. Thus they may be underestimating the amounts! It is clear from the article as at 2011, that oil companies are very familiar with clathrates as a problem with their production of oil etc.