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

Journal Contribution - Journal Article

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.
Journal: Geophys Res Lett
ISSN: 0094-8276
Issue: 4
Volume: 51
Pages: 1-12
Publication year:2024
Keywords:clumped isotopes, freshwater ostracods, vital effect, paleo-limnology, paleoclimate, paleoenvironment
  • WoS Id: 001165075400001
  • ORCID: /0000-0001-8230-0223/work/153928018
  • ORCID: /0000-0003-3770-4055/work/153926896
  • ORCID: /0000-0002-6027-5482/work/153924462
  • ORCID: /0000-0002-6666-7153/work/153924274
  • ORCID: /0000-0002-4585-7687/work/153924261
  • DOI: https://doi.org/10.1029/2023gl107426
  • Scopus Id: 85185550626