Articles | Volume 18, issue 19
Biogeosciences, 18, 5447–5463, 2021
https://doi.org/10.5194/bg-18-5447-2021
Biogeosciences, 18, 5447–5463, 2021
https://doi.org/10.5194/bg-18-5447-2021

Research article 07 Oct 2021

Research article | 07 Oct 2021

Modeling the marine chromium cycle: new constraints on global-scale processes

Frerk Pöppelmeier 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-2021-106', Anonymous Referee #1, 04 Jun 2021
    • AC1: 'Reply on RC1', Frerk Pöppelmeier, 22 Jul 2021
  • RC2: 'Comment on bg-2021-106', Catherine Jeandel, 09 Jun 2021
    • AC2: 'Reply on RC2', Frerk Pöppelmeier, 22 Jul 2021
  • RC3: 'Comment on bg-2021-106', Roger Francois, 13 Jun 2021
    • AC3: 'Reply on RC3', Frerk Pöppelmeier, 22 Jul 2021
  • RC4: 'Comment on bg-2021-106', Edward Boyle, 28 Jul 2021
    • AC4: 'Reply on RC4', Frerk Pöppelmeier, 02 Aug 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (03 Aug 2021) by Gwenaël Abril
AR by Frerk Pöppelmeier on behalf of the Authors (03 Aug 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (31 Aug 2021) by Gwenaël Abril
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Short summary
Chromium (Cr) is a redox-sensitive element that holds promise as a tracer of ocean oxygenation and biological activity. We here implemented the oxidation states Cr(III) and Cr(VI) in the Bern3D model to investigate the processes that shape the global Cr distribution. We find a Cr ocean residence time of 5–8 kyr and that the benthic source dominates the tracer budget. Further, regional model–data mismatches suggest strong Cr removal in oxygen minimum zones and a spatially variable benthic source.
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