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Main » 2010 » April » 6 » Ices of Antarctica hide "a metane bomb"
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Ices of Antarctica hide "a metane bomb"
Under an ice board of Antarctica the whole system of the rivers and the lakes, occupied by microorganisms which in case of thawing of ices can let out in atmosphere a methane large quantity - the strongest hotbed gas disappears, has informed Dzhemma Vedhem (Jemma Wadham), the geochemist from university of the British Bristol, at conference of the American geophysical union in Baltimore.
Last years scientists have established that water disappears under mostly Antarctic ice board. Under two-kilometre thickness of ice the set of water streams and the lakes, most known of which disappears - the lake the East in which scientists hope to get next winter.
This water world can serve as a shelter of huge quantity of microorganisms-metanogenov, therefore in case of thawing of an ice trap in which they are concluded, the collected methane can get to atmosphere, considerably having accelerated processes of global warming.
Vedchem and its colleagues samples of ice from Right's Antarctic glacier and from Russell's glacier in Greenland took. In samples there was a considerable quantity of methane and bacteria-metanogenov. In the Antarctic ice it has appeared more than 10 million bacterial cages on gramme, in Greenland - about 100 thousand, the researcher marks.
The specific structure of microorganisms was close to what is found out in subpolar areas, in particular, in the Arctic tundra.
Then scientists have placed probes from samples in vessels to find out, how microorganisms will grow. "To the Antarctic samples there were nothing approximately 250 days, and then suddenly - бам! - we have received a methane large quantity", - tells Vedhem which words are resulted by edition Science News.
To the Greenland samples of anything similar has occurred, but as the geochemist marks, experiment still proceeds, and is possible, they still "will shoot".
Other participant of conference, Mark Skidmor (Mark Skidmore), the microbiologist from university of Montana, also has found out bacteria-metanogeny in Robertson's Canadian glacier. This research and other reports presented at conference draws Antarctica as much more dynamical and "fluid" world, than it was represented earlier. So, the group of scientists of Edinburgh could find out under ice at least 386 lakes.
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