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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Methane stored below permafrost is an unknown quantity in the Arctic greenhouse gas budget. In coastal areas with rising sea levels, much of the methane seeps into the sea and is removed before it reaches the atmosphere. However, where land uplift outpaces rising sea levels, the former seabed freezes, pressurising methane-rich groundwater beneath, which then escapes via permafrost seepages called pingos. We describe this mechanism and the origins of the methane discharging from Svalbard pingos.
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TC | Articles | Volume 14, issue 11
TC | Articles | Volume 14, issue 11
The Cryosphere, 14, 3829–3842, 2020
https://doi.org/10.5194/tc-14-3829-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
The Cryosphere, 14, 3829–3842, 2020
https://doi.org/10.5194/tc-14-3829-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
TC | Articles | Volume 14, issue 11

Research article 09 Nov 2020

Research article | 09 Nov 2020

Sub-permafrost methane seepage from open-system pingos in Svalbard

Andrew J. Hodson et al.

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Short summary
Methane stored below permafrost is an unknown quantity in the Arctic greenhouse gas budget. In coastal areas with rising sea levels, much of the methane seeps into the sea and is removed before it reaches the atmosphere. However, where land uplift outpaces rising sea levels, the former seabed freezes, pressurising methane-rich groundwater beneath, which then escapes via permafrost seepages called pingos. We describe this mechanism and the origins of the methane discharging from Svalbard pingos.
Read more
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The Cryosphere

An interactive open-access journal of the European Geosciences Union

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