%0 Journal Article %T Response of conifers to UV-B and climate in mountain areas %J Global Journal of Environmental Science and Management %I GJESM Publisher (Professor J. Nouri) %Z 2383-3572 %A Bondarenko, S.L. %A Savchuk, D.A. %D 2018 %\ 07/01/2018 %V 4 %N 3 %P 299-314 %! Response of conifers to UV-B and climate in mountain areas %K Climate change %K Conifers %K Growth hormones %K Principal components %K Singular spectrum analysis %K Tree-ring density %K Ultraviolet-B radiation %R 10.22034/GJESM.2018.03.004 %X The present study was focused to examine the combined effects of climate and ultraviolet-B radiation on conifer tree-ring density. Statistical methods were employed to extract tree responses in annual ring density and to identify functional relationship in trees when the level of ultraviolet-B radiation changes regardless of climate variations. In this study, the consideration was given to the series of total ozone content (instead of ultraviolet-B), tree-ring density, and De Martonne aridity index. After the correlation analysis, all trees were divided into two groups: 1) Trees whose correlation between tree ring density and UV-B values in April is significantly positive; 2) Trees whose correlation between tree ring density and aridity index values in March-September is significantly negative. Then, tree-ring series for the Swiss Alps in each group were generalized and decomposed into separate components: long period trends, ultraviolet-B and climatic signals. For the ultraviolet-B-responsive tree group in the period 1932-1974, the correlation coefficient between the density and ultraviolet-B was 0.55 at p %U https://www.gjesm.net/article_31369_92c324d09b6e1983def367e379c7f082.pdf