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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 9
Biogeosciences, 14, 2283–2292, 2017
https://doi.org/10.5194/bg-14-2283-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Climate–carbon–cryosphere interactions in the...

Biogeosciences, 14, 2283–2292, 2017
https://doi.org/10.5194/bg-14-2283-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 05 May 2017

Research article | 05 May 2017

The origin of methane in the East Siberian Arctic Shelf unraveled with triple isotope analysis

Célia J. Sapart et al.

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Short summary
The Arctic Ocean, especially the Siberian shelves, overlays large areas of subsea permafrost that is degrading. We show that methane with a biogenic origin is emitted from this permafrost. At locations where bubble plumes have been observed, methane can escape oxidation in the surface sediment and rapidly migrate through the very shallow water column of this region to escape to the atmosphere, generating a positive radiative feedback.
The Arctic Ocean, especially the Siberian shelves, overlays large areas of subsea permafrost...
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