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

• الحاوية / القاعدة: Geophysical Research Letters
• المؤلفون الرئيسيون: Marta Marchegiano, Marion Peral, Jeroen Venderickx, Koen Martens, Antonio García‐Alix, Christophe Snoeck, Steven Goderis, Philippe Claeys
• التنسيق: مقال
• اللغة: الإنجليزية
• منشور في: Wiley 2024-02-01
• الموضوعات: clumped isotopes; freshwater ostracods; vital effect; paleo‐limnology; paleoclimate; paleoenvironment
• الوصول للمادة أونلاين: https://doi.org/10.1029/2023GL107426
• تدمد: 0094-8276; 1944-8007

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.