Publication Date:
2023-06-27
Description:
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.
Keywords:
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; Globigerina bulloides, 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
Type:
Dataset
Format:
text/tab-separated-values, 42 data points
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