Articles | Volume 11, issue 3
https://doi.org/10.5194/cp-11-523-2015
https://doi.org/10.5194/cp-11-523-2015
Research article
 | 
24 Mar 2015
Research article |  | 24 Mar 2015

Evidence for the non-influence of salinity variability on the Porites coral Sr/Ca palaeothermometer

M. Moreau, T. Corrège, E. P. Dassié, and F. Le Cornec

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Cited articles

Alibert, C. and Kinsley, L.: A 170-year Sr/Ca and Ba/Ca coral record from the western Pacific warm pool: 1. What can we learn from an unusual coral record?, J. Geophys. Res. Oc., 113, 2156-2202, 2008.
Alibert, C. and McCulloch., M. T.: Strontium/Calcium ratios in modern Porites corals from the Great Barrier Reef as a proxy for sea surface temperature: Calibration of the thermometer and monitoring of ENSO, Paleoceanography, 12, 345–363, 1997.
Alibert, C., Kinsley, L., Fallon, S. J., McCulloch, M. T., Berkelmans, R., and McAllister, F.: Source of trace element variability in Great Barrier Reef corals affected by the Burdekin flood plumes, Geochim. Cosmochim. Acta, 67, 231–246, 2003.
Allison N., Finch A. A., Sutton, S. R., and Newville, M.: Strontium heterogeneity and speciation in coral aragonite: implications for the strontium paleothermometer, Geochim.Cosmochim. Ac., 65, 2669–2676, 2001.
Amiel, A. J., Friedman, G. M., and Miller, D. S.: Distribution and nature of incorporation of trace elements in modern aragonitic corals, Sedimentology, 20, 47–64, 1973.
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Short summary
The influence of salinity on the Porites Sr/Ca palaeothermometer is still poorly documented. We test the salinity effect on Porites Sr/Ca-based SST reconstructions using a large spatial compilation of published Porites data from the Pacific, Indian Ocean, and the Red Sea. We find no evidence of a salinity bias in the Sr/Ca SST proxy at monthly and interannual timescales using two different salinity products. This result is in agreement with laboratory experiments on coral species.