Single chamber Mg/Ca analyses of Globigerinoides ruber for paleo-proxy 
calibration using femtosecond LA-ICP-MS

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.

doi:10.1038/s41597-024-03402-0

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Single chamber Mg/Ca analyses of Globigerinoides ruber for paleo-proxy calibration using femtosecond LA-ICP-MS

MPS-Authors

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Fischer, Alexa
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons192728

Schiebel, Ralf
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101034

Jochum, Klaus Peter
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons298930

Heins, Lena
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons273227

Arns, Anthea I.
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons246446

Aardema, Hedy M.
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons292251

Slagter, Hans
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons246455

Calleja, Maria Ll.
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons298932

Levy, Noy
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101291

Stoll, Brigitte
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons140184

Walter, David
Multiphase Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101360

Weis, Ulrike
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons211488

Repschläger, Janne
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons187781

Haug, Gerald H.
Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society;

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https://www.nature.com/articles/s41597-024-03402-0.pdf
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Citation

Fischer, A., Schiebel, R., Jochum, K. P., Heins, L., Arns, A. I., Aardema, H. M., et al. (2024). Single chamber Mg/Ca analyses of Globigerinoides ruber for paleo-proxy calibration using femtosecond LA-ICP-MS. Scientific Data, 9: 583. doi:10.1038/s41597-024-03402-0.

Cite as: https://hdl.handle.net/21.11116/0000-000F-637A-9

Abstract

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.