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      Stable Isotopes in Tree Rings : Inferring Physiological, Climatic and Environmental Responses 

      Stable Isotopes in Tree Rings of Boreal Forests

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          Abstract

          The boreal forests are widely expanded from subarctic forest to tundra, and from taigato forest-steppe zone (from 50 °N to 70 °N). We reviewed available stable isotope chronologies in tree-ring cellulose (δ 13C, δ 18O and δ 2H) from 16 sites located in the Russian Federation; 4 research sites from Fennoscandia (Finland, Sweden and Norway); 5 sites from Canada, and 1 site from Alaska (USA) to evaluate impact of climatic changes from seasonal to annual scale across boreal forest ecosystems. Results of our review of carbon isotope data showed that droughtconditions (mainly high vapour pressure deficit) are prevalent for western and central regions of Eurasia, Alaska and Canada, while northeastern and eastern sites of Eurasian subarctic are showing water shortage developments resulting from decreasing precipitation. Oxygen isotopechronologies show increasing trends towards the end of the twentieth century mainly for all chronologies, except for the Siberian northern and southern sites. The application of the multiple stable isotope proxies (δ 13C, δ 18O, δ 2H) is beneficial to study responses of boreal forests to climate change in temperature-limited environments. However, a deeper knowledge of hydrogen isotope fractionation processes at the tree-ring cellulose level is needed for a sound interpretation and application of δ 2H for climate reconstructions, especially for the boreal forest zone where forest ecosystems are more sensitive to climatic and environmental changes.

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          Updated high-resolution grids of monthly climatic observations - the CRU TS3.10 Dataset

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            A high-resolution data set of surface climate over global land areas

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              Stable isotopes in precipitation

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                Author and book information

                Book Chapter
                2022
                June 07 2022
                : 581-603
                10.1007/978-3-030-92698-4_20
                cfad9afe-3196-42fd-8808-dd07abc1e560
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