Autor: |
Fischer, Alexa, Schiebel, Ralf, Jochum, Klaus Peter, Heins, Lena, Arns, Anthea I., Aardema, Hedy M., Slagter, Hans, Calleja, Maria Ll., Levy, Noy, Stoll, Brigitte, Walter, David, Weis, Ulrike, Repschläger, Janne, Haug, Gerald H. |
Předmět: |
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Zdroj: |
Scientific Data; 6/4/2024, Vol. 11 Issue 1, p1-9, 9p |
Abstrakt: |
Mg/Ca is an independent proxy in paleoceanography to reconstruct past seawater temperature. Femtosecond Laser Ablation Inductively Coupled Plasma Mass Spectrometry (fs-LA-ICP-MS) was employed to determine the Mg/Ca composition of tests (shells) of the planktic foraminifer species Globigerinoides ruber albus (white chromotype) and G. ruber ruber (red/pink chromotype) sampled alive from the temperate to subtropical eastern North Atlantic with the research sailing yacht Eugen Seibold. Mg/Ca data are compared to (i) the measured in-situ temperature of ambient seawater, (ii) average mixed layer temperature, and (iii) sea surface temperature (SST). The pooled mean chamber Mg/Ca from each plankton tow site exhibits a positive relationship with SST. Two chamber-specific calibrations are derived, which are consistent with previous calibration equations for comparable paleo-archives. The results confirm fs-LA-ICP-MS as reliable method for determining Mg/Ca in G. ruber, and both the penultimate and antepenultimate chambers of adult specimens may provide comprehensible Mg/Ca temperatures of the surface ocean. [ABSTRACT FROM AUTHOR] |
Databáze: |
Complementary Index |
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