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Climate of the Past An interactive open-access journal of the European Geosciences Union
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CP | Articles | Volume 16, issue 4
Clim. Past, 16, 1223–1243, 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Clim. Past, 16, 1223–1243, 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Review article 13 Jul 2020

Review article | 13 Jul 2020

An overview on isotopic divergences – causes for instability of tree-ring isotopes and climate correlations

Martine M. Savard and Valérie Daux

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Cited articles

Agathokleous, E., Belz, R. G., Calatayud, V., De Marco, A., Hoshika, Y., Kitao, M., Saitanis, C. J., Sicard, P., Paoletti, E., and Calabrese, E. J.: Predicting the effect of ozone on vegetation via linear non-threshold (LNT), threshold and hormetic dose-response models, Sci. Total Environ., 649, 61–74,, 2019. 
An, W., Liu, X., Hou, S., Zeng, X., Sun, W., Wang, W., Wang, Y., Xu, G., and Ren, J.: Unstable relationships between tree ring δ18O and climate variables over southwestern China: possible impacts from increasing central Pacific SSTs, Theor. Appl. Climatol., 136, 391–402,, 2019. 
Andreu-Hayles, L., Ummenhofer, C. C., Barriendos, M., Schleser, G. H., Helle, G., Leuenberger, M., Gutiérrez, E., and Cook, E. R.: 400 Years of summer hydroclimate from stable isotopes in Iberian trees, Clim. Dynam., 49, 143–161,, 2017. 
Andreu-Hayles, L., Levesque, M., Martin-Benito, D., Huang, W., Harris, R., Oelkers, R., Leland, C., Martin-Fernández, J., Anchukaitis, K. J., and Helle, G.: A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes, Chem. Geol., 504, 53–65,, 2019. 
Arneth, A., Lloyd, J., Šantrůčková, H., Bird, M., Grigoryev, S., Kalaschnikov, Y. N., Gleixner, G., and Schulze, E. D.: Response of central Siberian Scots pine to soil water deficit and long-term trends in atmospheric CO2 concentration, Global Biogeochem. Cycles, 16, 5-1–5-13,, 2002. 
Publications Copernicus
Short summary
Climatic reconstructions based on tree-ring isotopic series convey key information on past conditions prevailing in forested regions. However, in some cases, the relations between isotopes and climate appear unstable over time, generating isotopic divergences. Former reviews have thoroughly discussed the divergence concept for tree-ring width but not for isotopes. Here we present a synopsis of the isotopic divergence problem and suggest collaborative work for improving climatic reconstructions.
Climatic reconstructions based on tree-ring isotopic series convey key information on past...