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运用树木年轮气候学的方法,研究天山中部山区天山云杉(Picea schrenkiana)不同胸径年表特征以及与气候因子之间的关系,揭示不同胸径云杉对气候因子的敏感度差异,以及胸径大小因素对年表的潜在影响.结果表明:(1)云杉敏感度与胸径大小有线性负相关关系,说明小胸径云杉与气候变化关系密切;(2)不同胸径云杉年表对气候因子的响应存在一致性,均表现为对上一年月降水与月平均温度存在显著的滞后作用,与上一年8月降水以及当年4、5月降水正相关,与上一年8、9月平均温度负相关,与当年生长季温度负相关;(3)不同胸径云杉年表对气候响应存在一定的差异,大胸径云杉主要是对上一年8月、当年5月降水的正响应,对月平均温度无显著的响应关系,而小胸径云杉不但对上一年8月和当年4、5月降水有显著的响应关系,对当年5月平均温度也有显著的负响应关系.因此,在树木年轮气候学研究中应该考虑胸径大小因素对年表的影响.
By using the method of tree ring climatology, this paper studied the chronological characteristics of climatic changes of Picea schrenkiana in the central Tianshan Mountains and its relationship with climatic factors to reveal the differences in sensitivity of spruce to climatic factors, (1) There is a linear negative correlation between the sensitivity of spruce and the diameter of breast-chest, indicating that the small-spruce spruce has a close relationship with climate change; (2) The effects of climatic factors , All showed a significant lagging effect on monthly precipitation and monthly average temperature in the previous year, which was positively correlated with the precipitation in August last year and the precipitation in April and May of that year, as compared with August and September of the previous year Negative correlation with mean temperature and negative correlation with the temperature of growing season in that year; (3) There were some differences in climatic response between different diameter spruce agendas, and the large-bore diameter spruce was mainly positive response to precipitation in August and May of that year , But there was no significant response to the monthly mean temperature. However, the small-diameter spruce not only had a significant response to precipitation in August and April and May but also had a significant negative response to the average temperature in May of that year. , In the trees Factors affecting the size of the diameter of the wheel chronology of research in climatology should be considered.