Study Rules Out Ancient Bursts Of Methane From Seafloor Deposits

A dramatic increase about 12,000 years ago in levels of atmospheric methane, a potent greenhouse gas, was most likely caused by higher emissions from tropical wetlands or from plant production, rather than a release from seafloor methane deposits, a new study concludes.
This research, to be published Friday in the journal Science, contradicts some suggestions that the sudden release of massive amounts of methane frozen in seafloor deposits may have been responsible – or at least added to – some past periods of rapid global warming, including one at the end of the last ice age.

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