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代用资料的重建与分析是古气候研究领域的一个重要课题,应用小波变换和功率谱研究了都兰树轮等8种温度代用资料的主要周期,并以此为基础进行滤波,结合动力学相关因子指数和相关系数从代用资料的动力学结构特征和外部特征两个角度研究其在不同尺度上的相似性.研究结果表明,准100a尺度是这些代用资料的共同周期,并且8种温度代用资料的动力学结构特征和外部特征在准100a及以上的尺度层次上是相似的,即外部特征和动力学结构特征两个方面均符合可比性条件.同时,随着尺度的降低,动力学结构特征和外部特征的可比性均降低.60—70a尺度及其以下的尺度,各分量之间的动力学结构特征失去了可比性;在小于30a的尺度上,它们的外部特征也不再具有可比性.
The reconstruction and analysis of proxy data is an important issue in paleoclimate research field. The main periods of eight kinds of temperature proxy data, such as Dulan tree wheel, are studied by using wavelet transform and power spectrum. Based on this, the filtering and dynamic correlation Factorial Index and Correlation Coefficient The similarity of different scales is studied from the dynamic structural characteristics and external characteristics of substitute data.The results show that the quasi-100a scale is the common cycle of these proxy data, and eight kinds of temperature substitution data The dynamic structural features and external features are similar at the scale of quasi-100a and above, that is to say, the external characteristics and the dynamic structural features meet the comparability conditions at the same time.At the same time, as the scale decreases, the dynamic structural features And comparability of external features are reduced.At the scale of 60-70a and below, the dynamic structural features of the components lose comparability; at less than 30a, their external features are no longer comparable .