The impact of ozone depletion to degradation processes of coniferous forests in the southern regions of Siberia
V.V. Zuev1,2, N.E. Zueva1, E.M. Korotkova1, A.V. Pavlinsky1
1Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch of the Russian Academy of Sciences, 634055, Tomsk, 10/3, Academichesky ave.
2National Research Tomsk State University, 36, Lenin Avenue, Tomsk, 634050,Russia
Keywords: усыхание хвойных лесов, общее содержание озона, вулканогенная депрессия озоносферы, коротковолновая ультрафиолетовая радиация, coniferous forests drying out, total ozone, ozone layer volcanic depletion, short-wave ultraviolet radiation
Abstract
The article analyzes the main factors leading to the rise in intensity of coniferous forests focal drying out on the territory of Southern Siberia, recorded during 1990-s. It has been shown that a significant factor weakening the resistance of coniferous trees, could be a long-term ozone depletion due to the constant presence of stratospheric volcanic aerosols caused by frequent Plinian eruptions of tropical belt volcanoes with VEI ≥ 4, which is why South Siberian region has been under continuous exposure to high doses of short-wave UV-B radiation since 1992 to 2012.
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