Climate of the Past
Climate of the Past
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Articles | Volume 21, issue 10
Articles | Volume 21, issue 10
https://doi.org/10.5194/cp-21-1871-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/cp-21-1871-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 10
Research article
 | 
27 Oct 2025
Research article |  | 27 Oct 2025

Persistent contamination in benthic-foraminifera-based Mg ∕ Ca thermometry using standard cleaning methods

Viktoria Larsson and Simon Jung

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Short summary
The deep ocean is an important part of the global climate system. Accurate estimates of temperature changes at depth are crucial to understand the role of the intermediate to deep ocean in climate change. We have used samples from the Indian Ocean to establish Mg/Ca-based temperature calibrations based on benthic foraminifera. Our data suggest that generating optimal Mg/Ca ratios in benthic foraminifera may require species- and region-specific cleaning procedures.
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