Articles | Volume 17, issue 1
https://doi.org/10.5194/bg-17-13-2020
https://doi.org/10.5194/bg-17-13-2020
Research article
 | 
02 Jan 2020
Research article |  | 02 Jan 2020

Benthic alkalinity and dissolved inorganic carbon fluxes in the Rhône River prodelta generated by decoupled aerobic and anaerobic processes

Jens Rassmann, Eryn M. Eitel, Bruno Lansard, Cécile Cathalot, Christophe Brandily, Martial Taillefert, and Christophe Rabouille

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Cited articles

Aller, R. C., Mackin, J. E., and Cox, R. T.: Diagenesis of Fe and S in Amazon inner shelf muds: apparent dominance of Fe reduction and implications for the genesis of ironstones, Cont. Shelf. Res., 6, 263–289, 1986. 
Aller, R. C., Blair, N. E., and Brunskill, G. J.: Early diagenetic cycling, incineration, and burial of sedimentary organic carbon in the central Gulf of Papua (Papua New Guinea), J. Geophys. Res., 113, 1–22, 2008. 
Andersson, A. J. and Mackenzie, F. T.: Revisiting four scientific debates in ocean acidification research, Biogeosciences, 9, 893–905, https://doi.org/10.5194/bg-9-893-2012, 2012. 
Andersson, A. J., Mackenzie, F. T., and Lerman, A.: Coastal ocean CO2-carbonic acid-carbonate sediment system of the Anthropocene, Global Biogochem. Cy., 20, GB1S92, https://doi.org/10.1029/2005GB002506, 2006. 
Anschutz, P., Zhong, S., Sundby, B., Mucci, A., and Gobeil, C.: Burial efficiency of phosphorus and the geochemistry of iron in continental margin sediments, Limnol. Oceanogr., 43, 53–64, 1998. 
Short summary
In this paper, we use a large set of measurements made using in situ and lab techniques to elucidate the cause of dissolved inorganic carbon fluxes in sediments from the Rhône delta and its companion compound alkalinity, which carries the absorption capacity of coastal waters with respect to atmospheric CO2. We show that sediment processes (sulfate reduction, FeS precipitation and accumulation) are crucial in generating the alkalinity fluxes observed in this study by in situ incubation chambers.
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