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

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 rub...

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Main Authors: Fischer, Alexa (Author) , Schiebel, Ralf (Author) , Jochum, Klaus P. (Author) , Heins, Lena (Author) , Arns, Anthea I. (Author) , Aardema, Hedy M. (Author) , Slagter, Hans (Author) , Calleja, Maria Ll (Author) , Levy, Noy (Author) , Stoll, Brigitte (Author) , Walter, David (Author) , Weis, Ulrike (Author) , Repschläger, Janne (Author) , Haug, Gerald H. (Author)
Format: Article (Journal)
Language:English
Published: 04 June 2024
In: Scientific data
Year: 2024, Volume: 11, Pages: 1-9
ISSN:2052-4463
DOI:10.1038/s41597-024-03402-0
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1038/s41597-024-03402-0
Verlag, kostenfrei, Volltext: https://www.nature.com/articles/s41597-024-03402-0
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Author Notes:Alexa Fischer, Ralf Schiebel, Klaus Peter Jochum, Lena Heins, Anthea I. Arns, Hedy M. Aardema, Hans Slagter, Maria Ll Calleja, Noy Levy, Brigitte Stoll, David Walter, Ulrike Weis, Janne Repschläger & Gerald H. Haug
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Summary: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.
Item Description:Gesehen am 04.02.2025
Physical Description:Online Resource
ISSN:2052-4463
DOI:10.1038/s41597-024-03402-0

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