Abstract:
In this paper, March to April average temperature was reconstructed for the period of 1755 to 1992 using a standard treering chronology of Zhenan, Shanxi province.The Abies chensiensis Van Tieghem at Yingzuizai, Zhenan, whose altitude is about 2500 meters high, is significantly affected by the early-spring temperature.The correlation coefficient between the two is up to 0.7.The regression equation for the calibration period, 1958 to 1992, explains nearly 50% of calibrated variance, with the equation confidence level 0.01 and high significant cross-verification testing parameters.The quasififty and two~three years periods are found significant in the reconstructed series by power spectrum method.The averag evalueabr uptchanges happened in 1798, 1853, 1884, and the standard deviation abrupt change in 1944.