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.

Model code and software

Modeling the marine chromium cycle: New constraints on global-scale processes: Model output data Pöppelmeier, Frerk; Janssen, David J.; Jaccard, Samuel L.; Stocker, Thomas F. https://doi.org/10.5281/zenodo.4699993

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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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