Biogeosciences
Biogeosciences
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Articles | Volume 21, issue 21
Articles | Volume 21, issue 21
https://doi.org/10.5194/bg-21-4927-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-21-4927-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 21
Research article
 | 
13 Nov 2024
Research article |  | 13 Nov 2024

Characterizing the marine iodine cycle and its relationship to ocean deoxygenation in an Earth system model

Keyi Cheng, Andy Ridgwell, and Dalton S. Hardisty

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Short summary
The carbonate paleoredox proxy, I / Ca, has shown its potential to quantify the redox change in the past ocean, which is of broad importance for understanding climate change and evolution. Here, we tuned and optimized the marine iodine cycling embedded in an Earth system model, “cGENIE”, against modern ocean observations and then tested its ability to estimate I / Ca in the Cretaceous ocean. Our study implies cGENIE’s potential to quantify redox change in the past using the I / Ca proxy.
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