Boussetta, Soumaya; Kallel, Nejib; Bassinot, Franck C; Labeyrie, Laurent D; Duplessy, Jean-Claude; Caillon, Nicolas; Dewilde, Fabien; Rebaubier, Hélène (2013): Sea Surface Temperature (SST) Mg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.808949, Supplement to: Boussetta, S et al. (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, https://doi.org/10.1016/j.crte.2012.02.001
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Abstract:
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.
Project(s):
Funding:
Seventh Framework Programme (FP7), grant/award no. 265103: Mediterranean Sea Acidification in a Changing Climate
Coverage:
Median Latitude: 40.366881 * Median Longitude: 8.979667 * South-bound Latitude: 38.490000 * West-bound Longitude: 1.591333 * North-bound Latitude: 42.043500 * East-bound Longitude: 14.300000
Date/Time Start: 1980-01-01T00:00:00 * Date/Time End: 1999-09-18T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
DED87-07 * Latitude: 39.410000 * Longitude: 13.340000 * Date/Time: 1987-01-01T00:00:00 * Elevation: -2970.0 m * Recovery: 16.45 m * Location: Mediterranean Sea * Campaign: DEDALE87 * Method/Device: Piston corer (PC) * Comment: No: DED87-07
KET80-03 * Latitude: 38.490000 * Longitude: 14.300000 * Date/Time: 1980-01-01T00:00:00 * Elevation: -1900.0 m * Recovery: 10.3 m * Location: Mediterranean Sea * Campaign: ETNA80 * Method/Device: Piston corer (PC) * Comment: No: KET8003
KET80-19 * Latitude: 40.330000 * Longitude: 13.210000 * Date/Time: 1980-01-01T00:00:00 * Elevation: -1920.0 m * Recovery: 6 m * Location: Mediterranean Sea * Campaign: ETNA80 * Method/Device: Piston corer (PC) * Comment: No: KET80-19
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Globigerina bulloides, Magnesium/Calcium ratio | G. bulloides Mg/Ca | mmol/mol | Boussetta, Soumaya | ||
| 4 | Globigerina bulloides, δ18O | G. bulloides δ18O | ‰ PDB | Boussetta, Soumaya | Isotope ratio mass spectrometry | |
| 5 | Sea surface temperature | SST | °C | Boussetta, Soumaya | Calculated (Shackleton, 1974) | |
| 6 | Temperature, calculated | T cal | °C | Boussetta, Soumaya | from Levitus & Boyer 1994 | April-May |
| 7 | Temperature, calculated | T cal | °C | Boussetta, Soumaya | from Levitus & Boyer 1994 | April-May-June |
| 8 | Sea surface temperature | SST | °C | Boussetta, Soumaya | Calculated from Mg/Ca ratios (Elderfield & Ganssen, 2000) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
42 data points