Articles | Volume 15, issue 8
https://doi.org/10.5194/bg-15-2565-2018
https://doi.org/10.5194/bg-15-2565-2018
Research article
 | 
02 May 2018
Research article |  | 02 May 2018

N2 fixation as a dominant new N source in the western tropical South Pacific Ocean (OUTPACE cruise)

Mathieu Caffin, Thierry Moutin, Rachel Ann Foster, Pascale Bouruet-Aubertot, Andrea Michelangelo Doglioli, Hugo Berthelot, Cécile Guieu, Olivier Grosso, Sandra Helias-Nunige, Nathalie Leblond, Audrey Gimenez, Anne Alexandra Petrenko, Alain de Verneil, and Sophie Bonnet

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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: Reconsider after major revisions (23 Jan 2018) by Helge Niemann
AR by Mathieu Caffin on behalf of the Authors (27 Feb 2018)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (06 Mar 2018) by Helge Niemann
RR by Annie Bourbonnais (22 Mar 2018)
ED: Publish subject to minor revisions (review by editor) (05 Apr 2018) by Helge Niemann
AR by Mathieu Caffin on behalf of the Authors (10 Apr 2018)  Author's response   Manuscript 
ED: Publish as is (11 Apr 2018) by Helge Niemann
AR by Mathieu Caffin on behalf of the Authors (12 Apr 2018)
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Short summary
We performed N budgets to assess the role of N2 fixation on production and export in the western tropical South Pacific Ocean. We deployed a combination of techniques including high-sensitivity measurements of N input and sediment traps deployment. We demonstrated that N2 fixation was the major source of new N before atmospheric deposition and upward nitrate fluxes. It contributed significantly to organic matter export, indicating a high efficiency of this region to export carbon.
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