Climatic significance of δD time series in tree rings from Tianmu Mountain

Based on cross-dating tree ring age from Tianmu Mountain, Zhejiang Province, theδD of each tree ring nitrocellulose was measured and then theδ D annual time series was established. Using meteorological data from Tianmu Mountain Observatory, the responds ofδ D of tree ring to climatic factors were analyzed. The results suggest that theδ D time series of the tree ring correlates well with climatic conditions, primarily with precipitation of the second half of each year, average annual air temperature and average annual maximum air temperature. The reconstructed maximum winter air temperature by theδ D of tree ring is in good correlation with local instrumental data. The low-frequency variations of reconstructed mean maximum air temperature of the winter in Tianmu Mountain corroborate with the temperature change in a large special scale. Tianmu Mountain is located in winter monsoon sensitive zone, thus the influence of winter temperature on tree growth is quite obvious. The results in this paper suggest thatδ D of tree ring is an effective proxy for winter temperature in non-limited regions.

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。