Tree-ring width chronologies are a critically important material to reconstruct past precipitation variability on the northeastern Tibetan Plateau (NTP). However, temperature signals are often encoded in these chronologies, which complicate the precipitation reconstructions and should be carefully assessed. Here, a dataset of 487 Qilian juniper (Juniperus przewalskii Kom.) tree-ring width series from 16 sites on the NTP were collected to investigate the influence of different temperature signals on the precipitation reconstructions. Correlation analysis showed that all tree-ring series recorded similar precipitation information, but had positive (p ≤ 0.05, Group1), weak (p > 0.05, Group2), and negative (p ≤ 0.05, Group3) correlations with temperature, respectively. In view of this, all tree-ring series were divided into three groups to develop chronologies to reconstruct local precipitation. During the calibration period of 1957–2011 CE, the Group1 reconstruction had the fastest uptrend, which almost overlapped the observed precipitation; the Group2 reconstruction showed a slower uptrend, whereas the Group3 reconstruction lacked an uptrend. As a result, we get different results when the reconstructions were used to assess the current precipitation status over the past millennium. The Group1 (Group2) reconstructions showed that the recent 20 (10) years were the highest precipitation period over the past millennium, whereas the Group3 reconstruction did not capture this phenomenon. Therefore, we caution that the temperature effects should be evaluated carefully before tree-ring width chronologies being employed to study past precipitation variability.

树木年轮宽度的年代学是重建东北青藏高原（NTP）过去降水变化的至关重要的材料。但是，温度信号通常以这些时间顺序编码，这使降水重建变得复杂，应仔细评估。在这里，收集了来自NTP上16个站点的487个祁连杜鹃（Juniperus przewalskii Kom。）树轮宽度序列的数据集，以研究不同温度信号对降水重建的影响。相关分析表明，记录的所有树木年轮一系列类似沉淀的信息，但有阳性（p  ≤0.05，组1），弱（p  > 0.05，第2组）和阴性（p ≤0.05，第3组）分别与温度相关。有鉴于此，将所有年轮系列划分为三类，以发展年代学来重建局部降水。在1957-2011 CE的校准期间，Group1重建的上升趋势最快，几乎与观测到的降水重叠；Group2重建显示上升趋势较慢，而Group3重建缺乏上升趋势。结果，当使用重建来评估过去千年中当前的降水状况时，我们得到了不同的结果。第1组（第2组）的重建表明，最近20（10）年是过去千年中最高的降水期，而第3组的重建没有捕捉到这一现象。所以，