Photomineralization and photomethanification of dissolved organic matter in Saguenay River surface water

Zhang, Y.; Xie, H.

doi:https://doi.org/10.5194/bg-12-6823-2015

Articles | Volume 12, issue 22

https://doi.org/10.5194/bg-12-6823-2015

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

https://doi.org/10.5194/bg-12-6823-2015

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

Articles | Volume 12, issue 22

Research article

|

30 Nov 2015

Research article |

| 30 Nov 2015

Photomineralization and photomethanification of dissolved organic matter in Saguenay River surface water

Y. Zhang and H. Xie

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Final revised paper (published on 30 Nov 2015)
Preprint (discussion started on 31 Aug 2015)

Interactive discussion

Status: closed

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

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- Supplement

SC C5922: 'Importance of photomineralization for carbon cycling in inland waters', Birgit Koehler, 30 Sep 2015
- SC C6637: 'Reply to SC C5922', Yong ZHANG, 18 Oct 2015
- AC C7507: 'Reply to SC C5922', Huixiang Xie, 10 Nov 2015
RC C6270: 'Review of bg-2015-385', Anonymous Referee #1, 07 Oct 2015
- AC C7508: 'Reply to Reviewer #1 (RC C6270)', Huixiang Xie, 10 Nov 2015
RC C6635: 'Photomineralization and photomethanification of dissolved organic matter in Saguenay River surface water Y. Zhang and H. Xie', Anonymous Referee #2, 18 Oct 2015
- AC C7509: 'Reply to Reviewer #2 (RC C6635)', Huixiang Xie, 10 Nov 2015

Peer-review completion

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

ED: Publish subject to minor revisions (Editor review) (10 Nov 2015) by Gerhard Herndl

AR by Huixiang Xie on behalf of the Authors (10 Nov 2015) Author's response Manuscript

ED: Publish as is (15 Nov 2015) by Gerhard Herndl

AR by Huixiang Xie on behalf of the Authors (16 Nov 2015)

Short summary

Sunlight-initiated photochemistry plays an important role in carbon and trace gases cycling in natural waters. We for the first time confirm that photochemical degradation of dissolved organic carbon (DOC) can produce methane, which is the second most important greenhouse gas in the atmosphere. Dissolved oxygen greatly affects the rates of DOC photodegradation and methane photoproduction. The implications of methane photoproduction for methane cycling in modern and ancient oceans are discussed.