Sea Surface Temperature (SST) Mg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides, supplement to: Boussetta, Soumaya; Kallel, Nejib; Bassinot, Franck C; Labeyrie, Laurent D; Duplessy, Jean Claude; Caillon, Nicolas; Dewilde, Fabien; Rebaubier, Hélène (2012): Mg/Ca-paleothermometry in the western Mediterranean Sea on planktonic foraminifer species Globigerina bulloides: Constraints and implications. Comptes Rendus Geoscience, 344(5), 267-276

• Main Authors: Boussetta, Soumaya, Kallel, Nejib, Bassinot, Franck C, Labeyrie, Laurent D, Duplessy, Jean Claude, Caillon, Nicolas, Dewilde, Fabien, Rebaubier, Hélène
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2013
• Subjects: Event label; DEPTH, sediment/rock; Globigerina bulloides, Magnesium/Calcium ratio; Globigerina bulloides, δ18O; Sea surface temperature; Temperature, calculated; Piston corer; Calypso Corer; Isotope ratio mass spectrometry; Calculated Shackleton, 1974; from Levitus & Boyer 1994; Calculated from Mg/Ca ratios Elderfield & Ganssen, 2000; DEDALE87; ETNA80; PROMETEI; MD114; Marion Dufresne 1972; Marion Dufresne 1995; Mediterranean Sea Acidification in a Changing Climate MedSeA; Hélène; Shackleton; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.808949; https://doi.pangaea.de/10.1594/PANGAEA.808949

We generated a high-resolution SSTMg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides from the core MD99-2346 collected in the Gulf of Lion, and compared it to that obtained using modern analogue techniques applied to fossil foraminiferal assemblages (SSTMAT). The two temperature records display similar patterns during the last 28,000 years but the SSTMg/Ca estimates are several degrees warmer (~+4 °C) than SSTMAT. The temperature shift between SSTMg/Ca and SSTMAT remained relatively constant over time. This seems to exclude a bias on the Mg/Ca record associated with salinity or secondary Mg-rich calcite encrustation on the foraminiferal tests during early diagenesis. Therefore, anomalously high Mg/Ca suggests either: (1) the empirical equation for G. bulloides of Elderfield and Ganssen (2000) is incorrect; or (2) there is a specific Mediterranean genotypes of G. bulloides for which a specific Mg/Ca-temperature calibration is needed.