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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 14
Biogeosciences, 12, 4317–4331, 2015
https://doi.org/10.5194/bg-12-4317-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Freshwater ecosystems in changing permafrost landscapes

Biogeosciences, 12, 4317–4331, 2015
https://doi.org/10.5194/bg-12-4317-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 24 Jul 2015

Research article | 24 Jul 2015

Thermokarst lake methanogenesis along a complete talik profile

J. K. Heslop et al.
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Short summary
The relative magnitude of thermokarst lake CH4 production in surface sediments vs. deeper-thawed permafrost is not well understood. We assessed CH4 production potentials from a lake sediment core and adjacent permafrost tunnel in interior Alaska. CH4 production was highest in the organic-rich surface lake sediments and recently thawed permafrost at the bottom of the talik, implying CH4 production is highly variable and that both modern and ancient OM are important to lake CH4 production.
The relative magnitude of thermokarst lake CH4 production in surface sediments vs. deeper-thawed...
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