From Eric Kvaalen
You report that “a stormier Arctic could fast-track methane gas into the atmosphere, potentially accelerating global warming” (30 November, p 18). But what is important is how much methane goes into the atmosphere over a period of years, not just after a storm. This is determined by the rate at which the methane is liberated from the sediment, which probably doesn’t depend much on storminess.
Les Essarts-le-Roi, France
