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

Closset, Ivia; Cardinal, Damien; Rembauville, Mathieu; Thil, François; Blain, Stéphane

doi:https://doi.org/10.5194/bg-13-6049-2016

Articles | Volume 13, issue 21

https://doi.org/10.5194/bg-13-6049-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/bg-13-6049-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 13, issue 21

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, Damien Cardinal, Mathieu Rembauville, François Thil, and Stéphane Blain

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Final revised paper (published on 03 Nov 2016)
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Preprint (discussion started on 08 Jun 2016)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review Closset BGD', Anonymous Referee #1, 27 Jun 2016
RC2: 'Review of Closset et al. BG-2016-236', Anonymous Referee #2, 19 Jul 2016
AC1: 'Reply to the reviewers', Ivia Closset, 15 Aug 2016
AC2: 'Additional comment', Ivia Closset, 16 Aug 2016

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Reconsider after major revisions (18 Aug 2016) by Clare Woulds

AR by Ivia Closset on behalf of the Authors (28 Aug 2016) Author's response Manuscript

ED: Publish subject to minor revisions (Editor review) (11 Sep 2016) by Clare Woulds

AR by Ivia Closset on behalf of the Authors (14 Sep 2016) Author's response Manuscript

ED: Publish as is (28 Sep 2016) by Clare Woulds

AR by Ivia Closset on behalf of the Authors (04 Oct 2016)

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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.