Articles | Volume 19, issue 3
Biogeosciences, 19, 715–741, 2022
https://doi.org/10.5194/bg-19-715-2022

Special issue: The Weddell Sea and the ocean off Dronning Maud Land: unique...

Biogeosciences, 19, 715–741, 2022
https://doi.org/10.5194/bg-19-715-2022

Research article 07 Feb 2022

Research article | 07 Feb 2022

Biogeochemical controls on ammonium accumulation in the surface layer of the Southern Ocean

Shantelle Smith 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-2021-149', Anonymous Referee #1, 11 Jun 2021
    • AC1: 'Reply on RC1, RC2, and RC3', Shantelle Smith, 14 Sep 2021
  • RC2: 'Comment on bg-2021-149', Anonymous Referee #2, 12 Jul 2021
    • AC1: 'Reply on RC1, RC2, and RC3', Shantelle Smith, 14 Sep 2021
  • RC3: 'Comment on bg-2021-149', Anonymous Referee #3, 16 Jul 2021
    • AC1: 'Reply on RC1, RC2, and RC3', Shantelle Smith, 14 Sep 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (25 Sep 2021) by Carol Robinson
ED: Reconsider after major revisions (25 Sep 2021) by Carol Robinson(Co-Editor-in-Chief)
AR by Shantelle Smith on behalf of the Authors (18 Oct 2021)  Author's response    Author's tracked changes
ED: Referee Nomination & Report Request started (29 Oct 2021) by Carol Robinson
RR by Anonymous Referee #1 (05 Nov 2021)
RR by Anonymous Referee #3 (15 Nov 2021)
ED: Publish subject to minor revisions (review by editor) (24 Nov 2021) by Carol Robinson
ED: Publish subject to minor revisions (review by editor) (24 Nov 2021) by Carol Robinson(Co-Editor-in-Chief)
AR by Shantelle Smith on behalf of the Authors (26 Nov 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (10 Dec 2021) by Carol Robinson
ED: Publish as is (10 Dec 2021) by Carol Robinson(Co-Editor-in-Chief)
AR by Shantelle Smith on behalf of the Authors (15 Dec 2021)  Author's response    Manuscript
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Short summary
Ammonium is a crucial yet poorly understood component of the Southern Ocean nitrogen cycle. We attribute our finding of consistently high ammonium concentrations in the winter mixed layer to limited ammonium consumption and sustained ammonium production, conditions under which the Southern Ocean becomes a source of carbon dioxide to the atmosphere. From similar data collected over an annual cycle, we propose a seasonal cycle for ammonium in shallow polar waters – a first for the Southern Ocean.
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