Beneath Melting Antarctica, a Powerful Greenhouse Gas Lurks
An enormous and previously unknown reservoir of potent methane - a� greenhouse gas 25 times more potent than carbon dioxide - could be locked beneath the Antarctic ice sheet, a new study in the journal Nature warns.
The scientists behind the study calculate that as much as 4 billion tons of methane gas could exist beneath the ice, and that if the alarming rate of polar melting continues and the vast reserve escapes into the atmosphere, the feedback loop of climate change already underway would be dramatically excellerated.
If the scientists are correct, these southern deposits would roughly match recent estimates of the amount of methane lurking beneath the northern Arctic ice sheets.
典here痴 a potentially large pool of methane hydrate in part of the Earth where we haven稚 previously considered it, said Jemma Wadham, professor of Glaciology at the U.K.痴 University of Bristol and lead author of the study, in a telephone interview with Bloomberg. 泥epending on where that hydrate is, and how much there is, if the ice thins in those regions, some of that hydrate could come out with a possible feedback on climate.
As the Press Association reports, the organic material in which the methane remains trapped "dates back to a period 35 million years ago when the Antarctic was much warmer than it is today and teeming with life."