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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 22
Biogeosciences, 12, 6823–6836, 2015
https://doi.org/10.5194/bg-12-6823-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 12, 6823–6836, 2015
https://doi.org/10.5194/bg-12-6823-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

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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Aarnos, H., Ylöstalo, P., and Vähätalo, A. V.: Seasonal phototransformation of dissolved organic matter to ammonium, dissolved inorganic carbon, and labile substrates supporting bacterial biomass across the Baltic Sea, J. Geophys. Res., 117, G01004, https://doi.org/10.1029/2010JG001633, 2012.
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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.
Sunlight-initiated photochemistry plays an important role in carbon and trace gases cycling in...
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