Abstract: The growth of Pinus koraiensis at the Fenglin national natural reserve of Wuying, Heilongjiang Province, is significantly correlated with the local October temperature of previous year. The mean temperature of October in Wuying was reconstructed for the period of 1796-2004 using residual tree ring chronology. In addition, the temperature in the late dekad of April also affected the tree ring radial width to some extent. In the past 209 years, there were 4 colder periods and 4 warmer periods in the reconstructed series; the most significant period of 3.33 years was detected by the power spectrum method. The abrupt changes on 30-year time scale were also detected in the reconstructed series by the smoothing T-test, the smoothing F-test and the Lepage-test; the significant abrupt changes in mean value were presented in about 1871 and 1900, and the significant abrupt changes in standard deviation in about 1851.

Key words: Wuying, climate change, tree ring, temperature reconstruction