An overview on isotopic divergences – causes for instability of tree-ring isotopes and climate correlations
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Published:2020-07-13
Issue:4
Volume:16
Page:1223-1243
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ISSN:1814-9332
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Container-title:Climate of the Past
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language:en
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Short-container-title:Clim. Past
Author:
Savard Martine M.,Daux Valérie
Abstract
Abstract. Climatic reconstructions based on tree-ring isotopic
series convey substantial information about past conditions prevailing in
forested regions of the globe. However, in some cases, the relations between
isotopic and climatic records appear unstable over time, generating the
“isotopic divergences”. Former reviews have thoroughly discussed the
divergence concept for tree-ring physical properties but not for isotopes.
Here we want to take stock of the isotopic divergence problem, express
concerns and stimulate collaborative work for improving paleoclimatic
reconstructions. There are five main causes for divergent parts in isotopic and climatic
series: (1) artefacts due to sampling and data treatment, relevant for
dealing with long series using sub-fossil stems; (2) stand dynamics,
including juvenile effects mostly occurring in the early part of tree-ring
series; (3) rise in atmospheric pCO2, which can directly influence the
foliar behaviour; (4) change in climate, which may modify the
isotope–climate causal links; and finally (5) atmospheric pollution, which may
alter leaf and root functions. Future paleoclimate research would benefit
from interdisciplinary efforts designed to develop further process-based
models integrating multi-proxy inputs so as to help identify causes of
isotopic divergences and circumvent some of them in inverse applications.
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Global and Planetary Change
Reference189 articles.
1. 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, https://doi.org/10.1016/j.scitotenv.2018.08.264, 2019. 2. 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,
https://doi.org/10.1007/s00704-018-2483-8, 2019. 3. 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, https://doi.org/10.1007/s00382-016-3332-z, 2017. 4. 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, https://doi.org/10.1016/j.chemgeo.2018.09.007, 2019. 5. 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, https://doi.org/10.1029/2000GB001374, 2002.
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