The Ostracod Clumped‐Isotope Thermometer: A Novel Tool to Accurately Quantify Continental Climate Changes
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.
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BibTeX
@article{marchegiano2026ostracod,
title = {{The Ostracod Clumped‐Isotope Thermometer: A Novel Tool to Accurately Quantify Continental Climate Changes}},
author = {Marta Marchegiano and Marion Peral and Jeroen Venderickx and Koen Martens and Antonio García‐alix and Christophe Snoeck and Steven Goderis and Philippe Claeys},
journal = {Geophysical Research Letters},
year = {2026},
month = oct,
doi = {10.1029/2023gl107426},
url = {https://hal.science/hal-05817284v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - The Ostracod Clumped‐Isotope Thermometer: A Novel Tool to Accurately Quantify Continental Climate Changes
AU - Marta Marchegiano
AU - Marion Peral
AU - Jeroen Venderickx
AU - Koen Martens
AU - Antonio García‐alix
AU - Christophe Snoeck
AU - Steven Goderis
AU - Philippe Claeys
PY - 2026
DA - 2026/10/19
JO - Geophysical Research Letters
DO - 10.1029/2023gl107426
UR - https://hal.science/hal-05817284v1
AB - 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.
SN - 0094-8276
SN - 1944-8007
ER -