Articles | Volume 12, issue 22
Biogeosciences, 12, 6823–6836, 2015
https://doi.org/10.5194/bg-12-6823-2015
Biogeosciences, 12, 6823–6836, 2015
https://doi.org/10.5194/bg-12-6823-2015
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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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.
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