Articles | Volume 14, issue 2
https://doi.org/10.5194/bg-14-415-2017
https://doi.org/10.5194/bg-14-415-2017
Research article
 | 
26 Jan 2017
Research article |  | 26 Jan 2017

Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa

Ella L. Howes, Karina Kaczmarek, Markus Raitzsch, Antje Mewes, Nienke Bijma, Ingo Horn, Sambuddha Misra, Jean-Pierre Gattuso, and Jelle Bijma

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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.
Allen, K. A., Hönisch, B., Eggins, S. M., Yu, J., Spero, H. J., and Elderfield, H.: Controls on boron incorporation in cultured tests of the planktic foraminifer Orbulina universa, Earth Planet. Sc. Lett., 309, 291–301, 2011.
Allen, K. A., Hönisch, B., Eggins, S. M., and Rosenthal, Y.: Environmental controls on B ∕ Ca in calcite tests of the tropical planktic foraminifer species Globigerinoides ruber and Globigerinoides sacculifer, Earth Planet. Sc. Lett., 351, 270–280, 2012.
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 Program, Bermuda, Earth Planet. Sc. Lett., 404, 67–76, 2014.
Balan, E., Pietrucci, F., Gervais, C., Blanchard, M., Schott, J., and Gaillardet, J.: First-principles study of boron speciation in calcite and aragonite, Geochim. Cosmochim. Ac., 193, 119–131, 2016.
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Short summary
To calculate the seawater carbonate system, proxies for 2 out of 7 parameters are required. The boron isotopic composition of foraminifera shells can be used as a proxy for pH and it has been suggested that B / Ca ratios may act as a proxy for carbonate ion concentration. However, differentiating between the effects of pH and [CO32−] is problematic, as they co-vary in natural systems. To deconvolve the effects, we conducted culture experiments with the planktonic foraminifer Orbulina universa.
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