Production regime and associated N cycling in the vicinity of Kerguelen Island, Southern Ocean

Cavagna, A. J.; Fripiat, F.; Elskens, M.; Mangion, P.; Chirurgien, L.; Closset, I.; Lasbleiz, M.; Florez-Leiva, L.; Cardinal, D.; Leblanc, K.; Fernandez, C.; Lefèvre, D.; Oriol, L.; Blain, S.; Quéguiner, B.; Dehairs, F.

doi:https://doi.org/10.5194/bg-12-6515-2015

Articles | Volume 12, issue 21

https://doi.org/10.5194/bg-12-6515-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

KEOPS2: Kerguelen Ocean and Plateau Study 2

https://doi.org/10.5194/bg-12-6515-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 12, issue 21

Research article

|

13 Nov 2015

Research article |

| 13 Nov 2015

Production regime and associated N cycling in the vicinity of Kerguelen Island, Southern Ocean

A. J. Cavagna, F. Fripiat, M. Elskens, P. Mangion, L. Chirurgien, I. Closset, M. Lasbleiz, L. Florez-Leiva, D. Cardinal, K. Leblanc, C. Fernandez, D. Lefèvre, L. Oriol, S. Blain, B. Quéguiner, and F. Dehairs

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Final revised paper (published on 13 Nov 2015)
Supplement to the final revised paper
Preprint (discussion started on 19 Dec 2014)

Interactive discussion

Status: closed

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

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- Supplement

RC C7916: 'Review of Cavagna et al', Anonymous Referee #1, 07 Jan 2015
- AC C9462: 'responses to reviewer 1', anne-julie cavagna, 02 Oct 2015
RC C9150: 'Review of: Biological productivity regime and associated N cycling in the vicinity of Kerguelen Island area, Southern Ocean (Cavagna et al.)', Anonymous Referee #2, 17 Mar 2015
- AC C9472: 'responses to reviewer 2', anne-julie cavagna, 02 Oct 2015

Peer-review completion

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

ED: Publish as is (13 Oct 2015) by Ingrid Obernosterer

AR by anne-julie cavagna on behalf of the Authors (14 Oct 2015) Author's response Manuscript

Short summary

Primary production, NO3- and NH4+ uptake, and nitrification rates were measured during the KEOPS 2 cruise (austral spring 2011) in the Kerguelen Plateau area. Natural iron fertilization stimulated primary production which is much higher in the fertilized areas compared to the HNLC site. We report high rates of nitrification in the mixed layer below the euphotic zone. We conclude that high productivity in deep mixing system stimulates the N cycle by increasing both assimilation and regeneration.