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Objective and reliable indicators are needed to study periodic and general climate changes in Central Asia. In Central Asia, the meteorological network has existed for only 50-80 years, and its data is not enough to solve questions about the climatic changes that interest us and the climate of past years. In the data of Chronicles and other historical documents, only isolated natural phenomena outside the norm, extremely harsh winters and large floods were recorded. This information is long-winded. One of the important objective indicators of the climate of past years is the annual layers of old trees.