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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Latest update: 30 Jan 2023
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Short summary
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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