The Ostracod Clumped-Isotope Thermometer: A Novel Tool to Accurately Quantify Continental Climate Changes

Marta Marchegiano, Marion Peral, Jeroen Venderickx, Koen Martens, Antonio García-Alix, Christophe Snoeck, Steven Goderis, Philippe Claeys

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract This study presents a methodological advancement in the field of clumped-isotope (?47) thermometry, specifically tailored for application to freshwater ostracods. The novel ostracod clumped isotope approach enables quantitative temperature and hydrological reconstruction in lacustrine records. The relationship between ?47 and the temperature at which ostracod shell mineralized is determined by measuring ?47 on different species grown under controlled temperatures, ranging from 4 ± 0.8 to 23 ± 0.5ºC. The excellent agreement between the presented ?47 ostracod data and the monitored temperatures confirms that ?47 can be applied to ostracod shells and that a vital effect is absent outside the uncertainty of measurements. Results are consistent with the carbonate clumped-isotope unified calibration (Anderson et al., 2021, https://doi.org/10.1029/2020gl092069), therefore, an ostracod-specific calibration is not needed. The ostracod clumped-isotope thermometer represents a powerful tool for terrestrial paleoclimate studies all around the world, as lakes and ostracods are found in all climatic belts.
Original languageEnglish
Article numbere2023GL107426
Pages (from-to)1-12
Number of pages13
JournalGeophysical Research Letters
Volume51
Issue number4
DOIs
Publication statusPublished - 28 Feb 2024

Bibliographical note

Funding Information:
We thank the AMGC-VUB technician David Verstraeten for his immensurable help and support during the analyses and Alvaro Fernandez Bremer for the helpful discussions. Authors would like to thank the editor Sarah Feakins, Niels de Winter and the two anonymous reviewers for their invaluable feedback, which greately contributed to improvement of this manuscript. The study was in part funded by Junta de Andalucía-Consejería de Universidad, Investigacion e Innovacion-Proyecto 21.00020 and PID2021-125619OB-C21 funded by Ministerio Ciencia e Innovación/Agencia Estatal de Investigación/10.13039/501100011033/and Fondo Europeo de Desarrollo Regional “Una manera de hacer Europa,” and the research group of the Junta de Andalucía RNM-190. MM wish to express their thanks for the financial support of the Swiss National Science Foundation (P2GEP2_181063). PC, SG. and CS thank the Research Foundation Flanders for funding the IRMS acquisition and the VUB Strategic Research for support. MP thanks VUB (OZR opvangmandaat' number 3772), and Research Foundation—Flanders (FWO) (senior postdoctoral grant (208064/1255923N LV 4508) for their supports.

Funding Information:
We thank the AMGC‐VUB technician David Verstraeten for his immensurable help and support during the analyses and Alvaro Fernandez Bremer for the helpful discussions. Authors would like to thank the editor Sarah Feakins, Niels de Winter and the two anonymous reviewers for their invaluable feedback, which greately contributed to improvement of this manuscript. The study was in part funded by Junta de Andalucía‐Consejería de Universidad, Investigacion e Innovacion‐Proyecto 21.00020 and PID2021‐125619OB‐C21 funded by Ministerio Ciencia e Innovación/Agencia Estatal de Investigación/10.13039/501100011033/and Fondo Europeo de Desarrollo Regional “Una manera de hacer Europa,” and the research group of the Junta de Andalucía RNM‐190. MM wish to express their thanks for the financial support of the Swiss National Science Foundation (P2GEP2_181063). PC, SG. and CS thank the Research Foundation Flanders for funding the IRMS acquisition and the VUB Strategic Research for support. MP thanks VUB (OZR opvangmandaat' number 3772), and Research Foundation—Flanders (FWO) (senior postdoctoral grant (208064/1255923N LV 4508) for their supports.

Publisher Copyright:
© 2024. The Authors.

Keywords

  • clumped isotopes
  • freshwater ostracods
  • vital effect
  • paleo-limnology
  • paleoclimate
  • paleoenvironment

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