Articles | Volume 18, issue 2
Biogeosciences, 18, 423–439, 2021
https://doi.org/10.5194/bg-18-423-2021
Biogeosciences, 18, 423–439, 2021
https://doi.org/10.5194/bg-18-423-2021

Research article 19 Jan 2021

Research article | 19 Jan 2021

Mg∕Ca, Sr∕Ca and stable isotopes from the planktonic foraminifera T. sacculifer: testing a multi-proxy approach for inferring paleotemperature and paleosalinity

Delphine Dissard et al.

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Cited articles

Anand, P., Elderfield, H., and Conte, M. H.: Calibration of Mg∕Ca thermometry in planktonic foraminifera from a sediment trap time series, Paleoceanography 18, 1050, https://doi.org/10.1029/2002PA000846, 2003. 
Anderson, G. M.: Error propagation by the Monte Carlo method in geochemical calculations, Geochim. Cosmochim. Ac., 40, 1533–1538, https://doi.org/10.1016/0016-7037(76)90092-2, 1976. 
Bahr, A., Nurnberg, D., Schonfeld, J., Garde-Schonberg, D.: Hydrological variability in Florida Straits during Marine Isotope Stage 5 cold events, Paleoceanography 26, PA2214, https://doi.org/10.1029/2010PA002015, 2011. 
Bé, A. W. H., Spero, H. J., and Anderson, O. R.: Effects of symbiont elimination and reinfection on the life processes of the planktonic foraminifer Globigerinoides sacculifer Mar. Biol., 70, 73-86, https://doi.org/10.1007/bf00397298, 1982. 
Bemis, B. E., Spero, H. J., Bijma, J., and Lea, D. W.: Reevaluation of the oxygen isotopic composition of planktonic foraminifera: Experimental results and revised paleotemperature equations, Paleoceanography, 13, 150–160, https://doi.org/10.1029/98PA00070, 1998. 
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Short summary
Results from a data set acquired from living foraminifera T. sacculifer collected from surface waters are presented, allowing us to establish a new Mg/Ca–Sr/Ca–temperature equation improving temperature reconstructions. When combining equations, δ18Ow can be reconstructed with a precision of ± 0.5 ‰, while successive reconstructions involving Mg/Ca and δ18Oc preclude salinity reconstruction with a precision better than ± 1.69. A new direct linear fit to reconstruct salinity could be established.
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