树木年轮重建阿勒泰西部1481-2004年6-9月降水量序列

Three kinds of chronologies were established according to the samples from west Altay Prefecture. The single correlation screen indicated that the correlation were significant between five tree-ring residual chronologies and the precipitation series from June to September, with a maximum correlation coefficient of -0.556. This result has distinct physiological significance. Using five tree- ring residual chronologies in Shaleha (t, t+1), the precipitation series in the recent 524 years was well reconstructed, and the equation reconstructed was stable by crossing-test. Analyzing the precipitation series found that in the recent 524 years of 1481-2004 the reconstructed precipitation series has nine wet periods and nine dry periods. The precipitation series from June to September in the recent 524 years reconstructed in the west Altay Prefecture have significant changing periods of 34.8a, 5.0-5.1a, 4.3-4.4a, 3.9-4.0a, 3.7a and 3.4 a. The abrupt changes of precipitation occurred in 1518, 1548, 1634, 1765 and 1856.