Calibration of the carbonate clumped isotope thermometer of land snail shells

Bao, Rui; Sheng, Xuefen; Li, Chenglong; Cui, Can; Yan, Hao; Ji, Junfeng; Chen, Jun

doi:10.1016/j.chemgeo.2023.121773

Cited by 1 publication

(1 citation statement)

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“…Research on potential vital effect in the Δ 47 signal of terrestrial biogenic carbonate, conducted on modern organisms that precipitated their shells under known temperatures, is scarce and so far limited to land snails in which the presence of such effect is still under debate (Bao et al, 2023;Bricker et al, 2023;Dong et al, 2021;Guo et al, 2019;Wang et al, 2021;Zaarur et al, 2011;Zhai et al, 2019;Zhang et al, 2018). A vital effect, linked to metabolic processes (i.e., rate of incorporation of HCO 3 or of CO 3 2 into the calcification sites during calcitic cuticle growth, Decrouy et al, 2011), exists for the δ 18 O signal of several, but not in all ostracod species.…”

Section: Absence Of Vital Effect In Ostracod Clumped-isotopes Measure...mentioning

confidence: 99%

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

Marchegiano,

Peral,

Venderickx

et al. 2024

Geophysical Research Letters

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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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