从 Tianmu 山基于跨 dating 树戒指年龄，浙江省，每树戒指硝化纤维素的 theD 被测量然后 D 年度时间系列被建立。用从 Tianmu 山天文台的气象学的数据，到气候的因素的树戒指的 D 的 responds 被分析。结果建议树的 D 时间系列与气候的条件包围相互关联很好，首先与每年的后半部的降水，平均年度空气温度并且平均年度最大的空气温度。由树戒指的 D 的重建的最大的冬季空气温度在与本地仪器的数据的好关联。在 Tianmu 山的冬季的重建的吝啬的最大的空气温度的低频率的变化在大特殊规模与温度变化支持。Tianmu 山位于冬季季风敏感地区，这样树生长上的冬季温度的影响是相当明显的。在这份报纸的结果建议树戒指的 D 是为在非有限的区域的冬季温度的一个有效代理。
The annual series of δ13C were measured in tree rings of three Cryptomeria fortunei disks (CF-1, CF-2, and CF-3) collected from West Tianmu Mountain, Zhejiang Province, China, according to cross-dating tree ring ages. There was no obvious decreasing trend of the δ13C annual time series of CF-2 before 1835. However, from 1835 to 1982 the three tree ring δ13C annual series exhibited similar decreasing trends that were significantly (P≤0.001) correlated. The distribution characteristics of a scatter diagram between estimated δ13C series of CF-2 from modeling and the atmospheric CO2 concentration extracted from the Law Dome ice core from 1840 to 1978 were analyzed and a curvilinear regression equation for reconstructing atmospheric CO2 concentration was established with R2 = 0.98. Also, a test of independent samples indicated that between 1685 and 1839 the reconstructed atmospheric CO2 concentration using the δ13C series of CF-2 had a close relationship with the Law Dome and Siple ice cores, with a standard deviation of 1.98. The general increasing trend of the reconstructed atmospheric CO2 concentration closely reflected the long-term variation of atmospheric CO2 concentration recorded both before and after the Industrial Revolution. Between 1685 and 1840 the evaluated atmospheric CO2 concentration was stable, but after 1840 it exhibited a rapid increase. Given a longer δ13C annual time series of tree rings, it was feasible to rebuild a representative time series to describe the atmospheric CO2 concentration for an earlier period and for years that were not in the ice core record.
