Trends In Elemental Concentrations of Tree Rings From the Siberian Arctic

The biogeochemistry and ecology of the Arctic environment have been heavily impacted by anthropogenic pollution and climate change. We used ICP-MS to measure concentrations of 26 elements in the AD 1300–2000 tree rings of larch from the Taymyr Peninsula in northern Siberia for studying the interacti...

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Bibliographic Details
Published in:Tree-Ring Research
Main Authors: Panyushkina, I. P., Shishov, V. V., Grachev, A. M., Knorre, A. A., Kirdyanov, A. V., Leavitt, S. W., Vaganov, E. A., Chebykin, E. P., Zhuchenko, N. A., Hughes, M. K.
Other Authors: Торгово-экономический институт, Научно-исследовательская часть, Кафедра математических методов и информационных технологий
Format: Article in Journal/Newspaper
Language:unknown
Published: 2016
Subjects:
wood chemistry
dendrochemistry
Larix decidua
biogeochemical cycling
soil acidification
permafrost thawing
Arctic pollution
Norilsk Nickel smelting complex
ICP-MS
34.35
Arctic
Taymyr
Norilsk
Climate change
norilsk
permafrost
Taymyr Peninsula
Siberia
Online Access:http://elib.sfu-kras.ru/handle/2311/33109
https://doi.org/10.3959/1536-1098-72.02.67
Description
Summary:The biogeochemistry and ecology of the Arctic environment have been heavily impacted by anthropogenic pollution and climate change. We used ICP-MS to measure concentrations of 26 elements in the AD 1300–2000 tree rings of larch from the Taymyr Peninsula in northern Siberia for studying the interaction between environmental change and wood chemistry. We applied a two-stage data reduction technique to identify trends in the noisy measurement data. Statistical assessment of variance of normalized time series reveals pronounced depletion of xylem Ca, Mg, Cl, Bi and Si concentrations and enrichment of P, K, Mn, Rb, Sr and Ba concentrations after ca. AD 1900. The trends are unprecedented in the 700-year records, but multiple mechanisms may be at work and difficult to attribute with certainty. The declining xylem Ca and Mg may be a response to soil acidification from air pollution, whereas increasing P, K, and Mn concentrations may signal changes in root efficiency and excess water-soluble minerals liberated by the permafrost thaw. The changes seem consistent with mounting stress on Arctic vegetation. This study supports the potential of tree rings for monitoring past and ongoing changes in biogeochemistry of Arctic ecosystems related to pollution and permafrost thaw.

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