TADEAS: to se asi "brzo" dozvime
An international team of oceanographers aboard the Russian research vessel Akademik Keldysh has confirmed a large-scale, ongoing release of methane from the seabed on the East Siberian Arctic Shelf.
The gas is believed to be released by the melting of subsea permafrost, which in turn allows the release of methane gas from previously-stable methane hydrates. The seabed of the East Siberian Arctic Shelf is unique in that large swaths contain permafrost layers built up some 20-30,000 years ago, when the area was dry land and sea levels were far lower.
"The discovery of actively releasing shelf slope hydrates is very important and
unknown until now,” chief scientist Igor Semiletov told the paper.
Their results have not yet been peer-reviewed or published, but they represent an extension of previous observations of methane seeps in the same area. In voyages to the region in years past, Semiletov's team has discovered large craters on the seabed emitting significant quantities of methane.
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