Insular Pine Forests of the Southern Urals and Ribbon Pine Forests of the Altai as Objects of Dendroclimatic Research

— It has recently become a matter of discussion whether it is correct to use regional tree-ring chronologies in spatiotemporal climate reconstructions, since natural and climatic conditions in the regions may be heterogeneous, varying on different scales (from micro to global). We have studied the response of tree-ring width to climate in Scots pine ( Pinus sylvestris L.) growing in the steppe zone, in insular pine forest of the Southern Urals and ribbon pine forests of Altai. Regional features and differences between the corresponding tree-ring chronologies obtained in the season of tree-ring formation (May–July) and spatiotemporal asynchrony in the long-term dynamics of tree-ring width in the study regions have been revealed.