More on those Siberian methane seeps

5 thoughts on “More on those Siberian methane seeps”

  1. There is evidence to suggest the current level of venting is new, from the ‘Independant’, 2008,

    “The preliminary findings of the International Siberian Shelf Study 2008, being prepared for publication by the American Geophysical Union, are being overseen by Igor Semiletov of the Far-Eastern branch of the Russian Academy of Sciences. Since 1994, he has led about 10 expeditions in the Laptev Sea but during the 1990s he did not detect any elevated levels of methane. However, since 2003 he reported a rising number of methane “hotspots”, which have now been confirmed using more sensitive instruments on board the Jacob Smirnitskyi.”

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  2. No prob’s JB.

    In 2008 Shakhova wrote,

    “Using indirect evidence it was shown that one such source may be highly potential and extremely mobile shallow methane hydrates, whose stability zone is seabed permafrost-related and could be disturbed upon permafrost development, degradation, and thawing. Further immobilization of stored methane could cause abrupt methane release and unpredictable climatic consequences”

    “The total value of ESS carbon pool is, thus, not less than 1,400 Gt of carbon. Since the area of geological disjunctives (fault zones, tectonically and seismically active areas) within the Siberian Arctic shelf composes not less than 1-2% of the total area and area of open taliks (area of melt through permafrost), acting as a pathway for methane escape within the Siberian Arctic shelf reaches up to 5-10% of the total area, we consider release of up to 50 Gt of predicted amount of hydrate storage as highly possible for abrupt release at any time. That may cause 12-times increase of modern atmospheric methane burden with consequent catastrophic greenhouse warming.”

    Real Climate is saying that the ESAS methane release is no great concern, 50Gt’s of Methane released any time soon seems pretty serious.

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  3. Atmospheric Methane levels have been flat for the last thousand years, indicating no increased emissions from warming Wetlands, as is currently observed, couldn’t this be seen as conclusive evidence against the global nature of the Medieval warm period?

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