Sea Surface Temperature (SST) Mg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides

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...

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Bibliographic Details
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 2013
Subjects:
101
99
Calculated (Shackleton
1974)
Calculated from Mg/Ca ratios (Elderfield & Ganssen
2000)
CALYPSO
Calypso Corer
DED87-07
DEDALE87
DEPTH
sediment/rock
ETNA80
Event label
from Levitus & Boyer 1994
Globigerina bulloides
Magnesium/Calcium ratio
δ18O
IMAGES V
Isotope ratio mass spectrometry
KET80-03
KET80-19
KET80-22
Marion Dufresne (1972)
Marion Dufresne (1995)
MD114
MD90-901
MD99-2344
MD99-2346
Mediterranean Sea
Mediterranean Sea Acidification in a Changing Climate
MedSeA
Neofan
PC
Piston corer
PROMETEI
ride Calmar
Sea surface temperature
Temperature
calculated
Shackleton
Planktonic foraminifera
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.808949
https://doi.org/10.1594/PANGAEA.808949
Description
Summary: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.

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