Articles | Volume 17, issue 13
Biogeosciences, 17, 3487–3510, 2020
https://doi.org/10.5194/bg-17-3487-2020
Biogeosciences, 17, 3487–3510, 2020
https://doi.org/10.5194/bg-17-3487-2020

Research article 08 Jul 2020

Research article | 08 Jul 2020

Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and pCO2 gradients

Maxence Guillermic et al.

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Short summary
Boron isotope ratios (δ11B) of foraminifera are a promising proxy for seawater pH and can be used to constrain pCO2. In this study, we derived calibrations for new foraminiferal taxa which extend the application of the boron isotope proxy. We discuss the origin of different δ11B signatures in species and also discuss the potential of using multispecies δ11B analyses to constrain vertical pH and pCO2 gradients in ancient water columns to shed light on biogeochemical carbon cycling in the past.
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