Towards improving the south of Western Siberia dendrochronological network
N. V. RYGALOVA1, V. S. MYGLAN2, Z. YU. ZHARNIKOV2, A. V. TAYNIK2, M. O. FILATOVA3, I. L. VAKHNINA2, V. V. BARINOV2
1Altai State University, Barnaul, Russia
2Siberian Federal University, Krasnoyarsk, Russia
3Institute of Archaeology and Ethnography of SB RAS, Novosibirsk, Russia
Keywords: tree-ring chronologies, Pinus sylvestris L, ribbon pine forests, Obiskie pine forests, south of Western Siberia, forest-steppe and steppe zones
Abstract
The paper presents a new network of tree-ring chronologies (TRW) completed for ribbon pine forests, Priobsky pine forest and pine forests in the south of Western Siberia (Altai region and Novosibirsk region) and describing the growth of annual ring widths of common pine ( Pinus sylvestris L.). Measurements of annual ring parameters were made on high-resolution digital images. A statistically significant relationship (from 0.83 to 0.46) was observed between all tree-ring series (maximum distance between points 330 km). On the basis of cluster and correlation analysis the local steppe and forest-steppe chronologies were combined into three regional chronologies (Pl5, Pl6, Pl7). Comparison of parameters of chronologies in Altai Krai and Novosibirsk region showed that the border between regions (and in physiographic terms - the border between southern and middle forest-steppe) is conditionally a kind of line dividing TRW chronologies into groups characterized by different sensitivity of radial growth to changes in environmental factors. At the same time, chronologies from stony slopes (spurs of the Kolyvan ridge) have maximum sensitivity. The results of the study allowed us to compare the dendroindication potential of pine forests of the study area and neighboring regions (the Urals, Siberia and Russian far East). The importance of purposeful selection of sample plots in ribbon pine forests and Priobsky pine forests was shown, since the use of a random set of chronologies will not allow to correctly reconstruct climatic conditions of tree growth.
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