TY - JOUR T1 - Updated calibration of the clumped isotope thermometer in planktonic and benthic foraminifera A1 - Peral,Marion A1 - Daeron,Mathieu A1 - Blamart,Dominique A1 - Bassinot,Franck A1 - Dewilde,Fabien A1 - Smialkowski,Nicolas A1 - Isguder,Gulay A1 - Bonnin,Jerome A1 - Jorissen,Frans A1 - Kissel,Catherine A1 - Michel,Elisabeth A1 - Vazquez Riveiros,Natalia A1 - Waelbroeck,Claire AD - Univ Paris Saclay, CEA CNRS UVSQ, LSCE IPSL, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France. AD - Univ Bordeaux, CNRS, EPOC, UMR 5805, Allee Geoffroy St Hilaire, F-33615 Pessac, France. AD - Univ Angers, UMR CNRS LPG BIAF Bioindicateurs Actuels & Fossil, 2 Blvd Lavoisier, F-49045 Angers, France. AD - IFREMER, Lab Geodynam & Enregistrement Sedimentaire, F-29280 Plouzane, France. UR - https://doi.org/10.1016/j.gca.2018.07.016 DO - 10.1016/j.gca.2018.07.016 KW - Carbonate clumped isotopes KW - Foraminifera KW - Paleothermometry N2 - Accurate reconstruction of past ocean temperatures is of critical importance to paleoclimatology. Carbonate clumped isotope thermometry (“Δ47”) is a relatively recent technique based on the strong relationship between calcification temperature and the statistical excess of 13C-18O bonds in carbonates. Its application to foraminifera holds great scientific potential, particularly because Δ47 paleotemperature reconstructions do not require assumptions regarding the 18O composition of seawater. However there are still relatively few published observations investigating the potential influence of parameters such as salinity or foraminiferal size and species. We present a new calibration data set based on 234 replicate analyses of 9 planktonic and 2 benthic species of foraminifera collected from recent core-top sediments, with calcification temperatures ranging from -2 to 25 °C. We observe a strong relationship between Δ47 values and independent, oxygen-18 estimates of calcification temperatures: Δ47 = 41.63 x 103 / T2 + 0.2056 The formal precision of this regression (±0.7-1.0 °C at 95 % confidence level) is much smaller than typical analytical errors. Our observations confirm the absence of significant species-specific biases or salinity effects. We also investigate potential foraminifer size effects between 200 and > 560 μm in 6 species, and conclude that all size fractions from a given core-top location and species display statistically undistinguishable Δ47 values. These findings provide a robust foundation for future inter-laboratories comparisons and paleoceanographic applications. Y1 - 2018/10 PB - Pergamon-elsevier Science Ltd JF - Geochimica Et Cosmochimica Acta SN - 0016-7037 VL - 239 SP - 1 EP - 16 ID - 56134 ER -