Quote:
Originally Posted by redpoint5
Methane requires a concentration of 50,000 ppm to explode, minimum. 16 is a long way off from that.
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Ah, 16 ppm of atmospheric methane (9+ times more than the atmospheric average) doesn't bother you at all. Of course, that is the measurement, AFTER the bubbling methane from a continental shelf reaches the water surface & mixes with the atmosphere. Methane is being absorbed readily in the water column, & much methane doesn't reach the atmosphere to mix. Plenty of thawing submerged AND land-based perma-frosts are showing evidence of methane eruptions. Of course, trapped methane bubbles are readily exploded by researchers, showing ever increasing volatility.