On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies
Assuming that foraminiferal clumped isotope (Δ47) values are independent of seawater salinity and pH, the combination of Mg/Ca, δ18O and Δ47 values, may in theory allow us to disentangle the temperature, salinity/δ18Osw and pH signals. Here, we present a new Mg/Ca-Δ47 dataset for modern planktonic f...
Published in: | Geochimica et Cosmochimica Acta |
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Online Access: | https://archimer.ifremer.fr/doc/00821/93251/99878.pdf https://doi.org/10.1016/j.gca.2022.10.030 https://archimer.ifremer.fr/doc/00821/93251/ |
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ftarchimer:oai:archimer.ifremer.fr:93251 2023-11-12T04:24:49+01:00 On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies Peral, Marion Bassinot, Franck Daëron, Mathieu Blamart, Dominique Bonnin, Jérôme Jorissen, Frans Kissel, Catherine Michel, Elisabeth Waelbroeck, Claire Rebaubier, Helene Gray, William R 2022-12 application/pdf https://archimer.ifremer.fr/doc/00821/93251/99878.pdf https://doi.org/10.1016/j.gca.2022.10.030 https://archimer.ifremer.fr/doc/00821/93251/ eng eng Elsevier BV https://archimer.ifremer.fr/doc/00821/93251/99878.pdf doi:10.1016/j.gca.2022.10.030 https://archimer.ifremer.fr/doc/00821/93251/ info:eu-repo/semantics/openAccess restricted use Geochimica Et Cosmochimica Acta (0016-7037) (Elsevier BV), 2022-12 , Vol. 339 , P. 22-34 text Article info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1016/j.gca.2022.10.030 2023-10-31T23:51:09Z Assuming that foraminiferal clumped isotope (Δ47) values are independent of seawater salinity and pH, the combination of Mg/Ca, δ18O and Δ47 values, may in theory allow us to disentangle the temperature, salinity/δ18Osw and pH signals. Here, we present a new Mg/Ca-Δ47 dataset for modern planktonic foraminifera, from various oceanographic basins and covering a large range of temperatures (from 0.2 to 25.4 °C). These measurements were performed on the same samples and species as the ones used for the foraminiferal Δ47 calibration of Peral et al. (2018), allowing comparison between both Mg/Ca and Δ47 paleothermometers (excluding the two benthic foraminiferal data points). There is a good agreement between these two paleothermometers when the Mg/Ca-temperature is corrected for seawater salinity and pH, suggesting that foraminiferal Δ47 may not be influenced by salinity or pH. However, our results show that Δ47 temperature uncertainties still limit our ability to reconstruct pH and δ18Osw from the combination of Mg/Ca, δ18O and Δ47 in a useful manner. We also find that disagreements between Mg/Ca and Δ47 values in G. bulloides persist after correction for vital, salinity and pH effects, suggesting that other process(es) may also influence Mg/Ca in this species. This study also provides an updated I-CDES version of the previously published planktonic and benthic foraminiferal Δ47 calibration of Peral et al. (2018), covering a range of temperature from −2 to 25.4 °C. Article in Journal/Newspaper Planktonic foraminifera Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Geochimica et Cosmochimica Acta 339 22 34 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Assuming that foraminiferal clumped isotope (Δ47) values are independent of seawater salinity and pH, the combination of Mg/Ca, δ18O and Δ47 values, may in theory allow us to disentangle the temperature, salinity/δ18Osw and pH signals. Here, we present a new Mg/Ca-Δ47 dataset for modern planktonic foraminifera, from various oceanographic basins and covering a large range of temperatures (from 0.2 to 25.4 °C). These measurements were performed on the same samples and species as the ones used for the foraminiferal Δ47 calibration of Peral et al. (2018), allowing comparison between both Mg/Ca and Δ47 paleothermometers (excluding the two benthic foraminiferal data points). There is a good agreement between these two paleothermometers when the Mg/Ca-temperature is corrected for seawater salinity and pH, suggesting that foraminiferal Δ47 may not be influenced by salinity or pH. However, our results show that Δ47 temperature uncertainties still limit our ability to reconstruct pH and δ18Osw from the combination of Mg/Ca, δ18O and Δ47 in a useful manner. We also find that disagreements between Mg/Ca and Δ47 values in G. bulloides persist after correction for vital, salinity and pH effects, suggesting that other process(es) may also influence Mg/Ca in this species. This study also provides an updated I-CDES version of the previously published planktonic and benthic foraminiferal Δ47 calibration of Peral et al. (2018), covering a range of temperature from −2 to 25.4 °C. |
format |
Article in Journal/Newspaper |
author |
Peral, Marion Bassinot, Franck Daëron, Mathieu Blamart, Dominique Bonnin, Jérôme Jorissen, Frans Kissel, Catherine Michel, Elisabeth Waelbroeck, Claire Rebaubier, Helene Gray, William R |
spellingShingle |
Peral, Marion Bassinot, Franck Daëron, Mathieu Blamart, Dominique Bonnin, Jérôme Jorissen, Frans Kissel, Catherine Michel, Elisabeth Waelbroeck, Claire Rebaubier, Helene Gray, William R On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies |
author_facet |
Peral, Marion Bassinot, Franck Daëron, Mathieu Blamart, Dominique Bonnin, Jérôme Jorissen, Frans Kissel, Catherine Michel, Elisabeth Waelbroeck, Claire Rebaubier, Helene Gray, William R |
author_sort |
Peral, Marion |
title |
On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies |
title_short |
On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies |
title_full |
On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies |
title_fullStr |
On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies |
title_full_unstemmed |
On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies |
title_sort |
on the combination of the planktonic foraminiferal mg/ca, clumped (δ47) and conventional (δ18o) stable isotope paleothermometers in palaeoceanographic studies |
publisher |
Elsevier BV |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00821/93251/99878.pdf https://doi.org/10.1016/j.gca.2022.10.030 https://archimer.ifremer.fr/doc/00821/93251/ |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Geochimica Et Cosmochimica Acta (0016-7037) (Elsevier BV), 2022-12 , Vol. 339 , P. 22-34 |
op_relation |
https://archimer.ifremer.fr/doc/00821/93251/99878.pdf doi:10.1016/j.gca.2022.10.030 https://archimer.ifremer.fr/doc/00821/93251/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.gca.2022.10.030 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
339 |
container_start_page |
22 |
op_container_end_page |
34 |
_version_ |
1782339289822003200 |