关键词: 南天山北坡西部, 树轮灰度年表, 初夏平均温度

Abstract:

Tree-ring grey degree chronologies were established according to samples from the west of northern slope of South Tianshan Mountains. Single correlation screen indicated that the correlations were significant between the tree-ring residual chronologies and the June—July mean temperature, and the maximum correlation coefficient was -0.588. At the same time, the result has distinct physiological significance. Based on the 4 tree-ring grey degree chronologies in LLS(t), QKS(t+1), QLK(t) and AHY(t+1), the June—July mean temperature series of northern slope of South Tianshan Mountains in the recent 156 a was well reconstructed; the reconstructed equation was stable and reliable proved by crossing-test. The reconstructed temperature series had experienced 6 warm periods and 5 cold periods, well corresponding to global change in most periods. There were significant period cycles of 11 years and 52 years in long-term change of temperature. The short period vibration weakened along with time, but the longer existed all the time. The temperature series appeared abrupt change in 1916 and1935.

Key words: west of northern slope of South Tianshan Mountains, tree-ring grey degree chronology, early summer temperature