Thermokarst lake methanogenesis along a complete talik profile

Heslop, J. K.; Walter Anthony, K. M.; Sepulveda-Jauregui, A.; Martinez-Cruz, K.; Bondurant, A.; Grosse, G.; Jones, M. C.

doi:https://doi.org/10.5194/bg-12-4317-2015

Articles | Volume 12, issue 14

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

https://doi.org/10.5194/bg-12-4317-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 12, issue 14

Research article

|

24 Jul 2015

Research article |

| 24 Jul 2015

Thermokarst lake methanogenesis along a complete talik profile

J. K. Heslop, K. M. Walter Anthony, A. Sepulveda-Jauregui, K. Martinez-Cruz, A. Bondurant, G. Grosse, and M. C. Jones

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Final revised paper (published on 24 Jul 2015)
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Preprint (discussion started on 24 Mar 2015)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC C1781: 'referee comment', Sergey Zimov, 29 Apr 2015
- AC C2983: 'Response to S. Zimov (Referee)', Joanne Heslop, 21 Jun 2015
RC C1898: 'Comments', Anonymous Referee #2, 06 May 2015
- AC C2984: 'Response to Anonymous Referee #2', Joanne Heslop, 21 Jun 2015

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish as is (01 Jul 2015) by Jorien Vonk

AR by Joanne Heslop on behalf of the Authors (07 Jul 2015) Author's response

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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.