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September-March mean temperature has been reconstructed back to A.D.1680 for the Kaiduhe River watershed on the southem slope of the Tien Shan Mountains, China, using the Picea schrenkiana tree-ring width.The reconstruction explains the variance of 47% in the observed mean temperature from 1953 to 2011.Power spectral and wavelet analyses demonstrated the existence of significant 50-year and 2-to 7-year cycles of variability.