Articles | Volume 17, issue 13
Biogeosciences, 17, 3487–3510, 2020
Biogeosciences, 17, 3487–3510, 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.

Related authors

Atmospheric CO2 estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific
Maxence Guillermic, Sambuddha Misra, Robert Eagle, and Aradhna Tripati
Clim. Past Discuss.,,, 2021
Revised manuscript accepted for CP
Short summary

Related subject area

Paleobiogeoscience: Proxy use, Development & Validation
Validation of a coupled δ2Hn-alkaneδ18Osugar paleohygrometer approach based on a climate chamber experiment
Johannes Hepp, Christoph Mayr, Kazimierz Rozanski, Imke Kathrin Schäfer, Mario Tuthorn, Bruno Glaser, Dieter Juchelka, Willibald Stichler, Roland Zech, and Michael Zech
Biogeosciences, 18, 5363–5380,,, 2021
Short summary
Experimental production of charcoal morphologies to discriminate fuel source and fire type: an example from Siberian taiga
Angelica Feurdean
Biogeosciences, 18, 3805–3821,,, 2021
Short summary
Toward a global calibration for quantifying past oxygenation in oxygen minimum zones using benthic Foraminifera
Martin Tetard, Laetitia Licari, Ekaterina Ovsepyan, Kazuyo Tachikawa, and Luc Beaufort
Biogeosciences, 18, 2827–2841,,, 2021
Short summary
Calibration of Mg ∕ Ca and Sr ∕ Ca in coastal marine ostracods as a proxy for temperature
Maximiliano Rodríguez and Christelle Not
Biogeosciences, 18, 1987–2001,,, 2021
Short summary
Technical note: Accelerate coccolith size separation via repeated centrifugation
Hongrui Zhang, Chuanlian Liu, Luz María Mejía, and Heather Stoll
Biogeosciences, 18, 1909–1916,,, 2021

Cited articles

Allen, K. A. and Hönisch, B.: The planktic foraminiferal B∕Ca proxy for seawater carbonate chemistry, A critical evaluation, Earth Planet. Sc. Lett., 345, 203–211, 2012. 
Anagnostou, E., John, E., Edgar, K., Foster, G., Ridgwell, A., Inglis, G., Pancost, R., Lunt, D., and Pearson, P., Changing atmospheric CO2 concentration was the primary driver of early Cenozoic climate, Nature, 533, 380–384, 2016. 
Anand, P., Elderfield, H., and Conte, M. H., Calibration of Mg∕Ca thermometry in planktonic foraminifera from a sediment trap time series, Paleoceanography, 18, 2003. 
Anderson, O. R. and Bé, A.W. H.: The ultrastructure of a planktonic foraminifer, Globigerinoides sacculifer (Brady), and its symbiotic dinoflagellates, J. Foramin. Res., 6, 1–21, 1976. 
Babila, T. L., Rosenthal, Y., and Conte, M. H.: Evaluation of the biogeochemical controls on B∕Ca of Globigerinoides ruber white from the Oceanic Flux Pro-gram, Bermuda, Earth Planet. Sc. Lett., 404, 67–76, 2014. 
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.
Final-revised paper