Detecting the permafrost carbon feedback: talik formation and increased cold-season respiration as precursors to sink-to-source transitions

Parazoo, Nicholas C.; Koven, Charles D.; Lawrence, David M.; Romanovsky, Vladimir; Miller, Charles E.

doi:https://doi.org/10.5194/tc-12-123-2018

Articles | Volume 12, issue 1

https://doi.org/10.5194/tc-12-123-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-12-123-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 1

Research article

|

12 Jan 2018

Research article |

| 12 Jan 2018

Detecting the permafrost carbon feedback: talik formation and increased cold-season respiration as precursors to sink-to-source transitions

Nicholas C. Parazoo, Charles D. Koven, David M. Lawrence, Vladimir Romanovsky, and Charles E. Miller

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Final revised paper (published on 12 Jan 2018)
Preprint (discussion started on 18 Sep 2017)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Reviewer comments', Anonymous Referee #1, 13 Oct 2017
- RC2: 'Review comments', Anonymous Referee #2, 13 Oct 2017
  - AC2: 'Response to Reviewer 2', Nicholas Parazoo, 20 Nov 2017
- AC1: 'Response to Reviewer 1', Nicholas Parazoo, 20 Nov 2017

Peer-review completion

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

AR by Nicholas Parazoo on behalf of the Authors (20 Nov 2017) Author's response Manuscript

ED: Publish as is (29 Nov 2017) by Moritz Langer

AR by Nicholas Parazoo on behalf of the Authors (29 Nov 2017)

Short summary

Carbon models suggest the permafrost carbon feedback (soil carbon emissions from permafrost thaw) acts as a slow, unobservable leak. We investigate if permafrost temperature provides an observable signal to detect feedbacks. We find a slow carbon feedback in warm sub-Arctic permafrost soils, but potentially rapid feedback in cold Arctic permafrost. This is surprising since the cold permafrost region is dominated by tundra and underlain by deep, cold permafrost thought impervious to such changes.