Articles | Volume 13, issue 21
Biogeosciences, 13, 6049–6066, 2016
https://doi.org/10.5194/bg-13-6049-2016
Biogeosciences, 13, 6049–6066, 2016
https://doi.org/10.5194/bg-13-6049-2016

Research article 03 Nov 2016

Research article | 03 Nov 2016

Unveiling the Si cycle using isotopes in an iron-fertilized zone of the Southern Ocean: from mixed-layer supply to export

Ivia Closset et al.

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Cited articles

Abraham, K., Opfergelt, S., Fripiat, F., Cavagna, A.-J., de Jong, J. T. M., Foley, S. F., André, L., and Cardinal, D.: δ30Si and δ29Si Determination on USGS BHVO-1 and BHVO-2 Reference Materials with a New Configuration on a Nu Plasma Multi-Collector ICP-MS, Geostand. Geoanal. Res., 32, 193–202, 2008.
Baines, S., Twining B. S., Brzezinski M. A., Nelson D. M., and Fisher N. S.: Causes and biogeochemical implications of regional differences in silicification of marine diatoms, Global Biogeochem. Cy., 24, GB4031, https://doi.org/10.1029/2010GB003856, 2010
Blain, S., Tréguer, P., Belviso, S., Bucciarelli, E., Denis, M., Desabre, S., Fiala, M., Martin Jézéquel, V., Le Fèvre, J., Mayzaud, P., Marty, J.-C., and Razouls, S.: A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean, Deep-Sea Research Pt. I, 48, 163–187, 2001.
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Isotopic measurements were used to investigate the seasonal evolution of the silicon (Si) biogeochemical cycle in a naturally iron-fertilized area of the Southern Ocean. When comparing data from early spring and summer periods, the relationship between Si depletion, biogenic silica production, and their isotopic composition appears decoupled in this region. Considering these results, we refined the seasonal net Si production that was mainly sustained by surface phytoplankton populations.
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