Articles | Volume 15, issue 14
https://doi.org/10.5194/bg-15-4647-2018
https://doi.org/10.5194/bg-15-4647-2018
Research article
 | 
30 Jul 2018
Research article |  | 30 Jul 2018

Seasonal development of iron limitation in the sub-Antarctic zone

Thomas J. Ryan-Keogh, Sandy J. Thomalla, Thato N. Mtshali, Natasha R. van Horsten, and Hazel J. Little

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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (29 May 2018) by Gerhard Herndl
AR by Thomas Ryan-Keogh on behalf of the Authors (03 Jun 2018)
ED: Publish as is (29 Jun 2018) by Gerhard Herndl
AR by Thomas Ryan-Keogh on behalf of the Authors (06 Jul 2018)  Manuscript 
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Short summary
The availability of iron in the Southern Ocean constrains the overall extent and magnitude of the phytoplankton bloom. Uncertainty remains over the dominant supply mechanisms, which are expected to be altered by climate change. Nutrient addition experiments confirm that iron limitation is seasonal in nature, with increased responses to iron addition in late summer. This is driven by variability in the supply mechanisms across the growing season, which fail to meet the phytoplankton demand.
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