Biogeosciences
Biogeosciences
Biogeosciences
Articles | Volume 18, issue 19
Articles | Volume 18, issue 19
Biogeosciences, 18, 5447–5463, 2021
https://doi.org/10.5194/bg-18-5447-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 18, 5447–5463, 2021
https://doi.org/10.5194/bg-18-5447-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 19
Research article
 | Highlight paper
07 Oct 2021
Research article  | Highlight paper | 07 Oct 2021

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

Frerk Pöppelmeier et al.

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Latest update: 02 Feb 2023
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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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