【摘要】 以大兴安岭根河地区兴安落叶松为研究对象,论述了合理建立标准化年轮年表的方法。根据兴安落叶松生长时受多种因素影响的特点,采用线性回归和负指数函数回归结合法拟合生长趋势曲线,利用比值法去除与树龄相关的生长趋势、保留气候信息,用加权平均法最终建立标准年轮年表。而且对年表特征及年表与气候要素的相关性进行了分析,年表的平均敏感度为0.213,信噪比为12.542,标准差为0.645。年轮年表与年平均温度、年平均最高温度和最低温度的相关性均达到0.01水平上显著相关,与年降水量呈负相关。相关分析表明,本文所建立的年轮年表科学、合理,可以进行重建过去气候变化的研究。更多还原

【Abstract】 Taking Larix gmelinii Rupr.in Genhe Area as the research object,the method of establishing the standard tree-ring chronoloty reasonably has been discussed.According to the characters of a variety of factors which affect the growth of Larix gmelinii Rupr.,the Binding Assay has been combined the linear regression and negative exponential function regression to fit the growth trend curve,the Ratio Method has been used to remove age-related growth trend and retain climate information,the weighted average method has been used to establish the standard tree-ring chronologies.The characteristics of tree-ring chronologies and the correlation between ring chronologies and climatic factors have been analyzed.The average sensitivity of chronologies is 0.213,the signal-to-noise ratio is 12.542,and the standard deviation is 0.645.The relation among the tree-ring chronology and annual temperature,annual mean maximum temperature,the minimum temperature has reached to significant correlation at level 0.01,and negatively with annual precipitation.Relational analysis shows that the ring chronologies constructed in this research is scientific and rational,which can rebuild the study about diversification of the past climate.更多还原