Articles | Volume 19, issue 14
Biogeosciences, 19, 3425–3444, 2022
https://doi.org/10.5194/bg-19-3425-2022
Biogeosciences, 19, 3425–3444, 2022
https://doi.org/10.5194/bg-19-3425-2022
Research article
20 Jul 2022
Research article | 20 Jul 2022

Controls on nitrite oxidation in the upper Southern Ocean: insights from winter kinetics experiments in the Indian sector

Mhlangabezi Mdutyana et al.

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2021-280', Anonymous Referee #1, 02 Dec 2021
  • RC2: 'Comment on bg-2021-280', Anonymous Referee #2, 18 Dec 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (09 Jun 2022) by Jack Middelburg
AR by Mhlangabezi Mdutyana on behalf of the Authors (23 Jun 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish subject to technical corrections (02 Jul 2022) by Jack Middelburg
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Short summary
Nitrite-oxidizing bacteria in the winter Southern Ocean show a high affinity for nitrite but require a minimum (i.e., "threshold") concentration before they increase their rates of nitrite oxidation significantly. The classic Michaelis–Menten model thus cannot be used to derive the kinetic parameters, so a modified equation was employed that also yields the threshold nitrite concentration. Dissolved iron availability may play an important role in limiting nitrite oxidation.
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