Articles | Volume 18, issue 4
Biogeosciences, 18, 1269–1289, 2021
https://doi.org/10.5194/bg-18-1269-2021
Biogeosciences, 18, 1269–1289, 2021
https://doi.org/10.5194/bg-18-1269-2021

Reviews and syntheses 18 Feb 2021

Reviews and syntheses | 18 Feb 2021

Reviews and syntheses: The biogeochemical cycle of silicon in the modern ocean

Paul J. Tréguer et al.

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Cited articles

Aller, R. C.: Sedimentary diagenesis, depositional environments, and benthic fluxes, in: Treatise on Geochemistry: Second edition, edited by: Holland, H. D. and Turekian, K. K., Elsevier, Oxford, 8, 293–334, 2014. 
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. Earth Surf., 113, 1–22, 2008. 
Aller, R. C., Blair, N. E., Xia, Q., and Rude, P. D.: Remineralization rates, recycling, and storage of carbon in Amazon shelf sediments, Cont. Shelf Res., 16, 753–786, 1996. 
Anschutz, P., Smith, T., Mouret, A., Deborde, J., Bujan, S., Poirier, D., and Lecroart, P.: Tidal sands as biogeochemical reactors, Estuar. Coast. Shelf Sci., 84, 84–90, 2009. 
Arsouze, T., Dutay, J.-C., Lacan, F., and Jeandel, C.: Reconstructing the Nd oceanic cycle using a coupled dynamical – biogeochemical model, Biogeosciences, 6, 2829–2846, https://doi.org/10.5194/bg-6-2829-2009, 2009. 
Short summary
Silicon is the second most abundant element of the Earth's crust. In this review, we show that silicon inputs and outputs, to and from the world ocean, are 57 % and 37 % higher, respectively, than previous estimates. These changes are significant, modifying factors such as the geochemical residence time of silicon, which is now about 8000 years and 2 times faster than previously assumed. We also update the total biogenic silica pelagic production and provide an estimate for sponge production.
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