Stationary (time-stable) relationships between a tree-ring proxy and climatic drivers are a prerequisite for using tree rings as paleo-climatological archives, but non-stationarity has been detected worldwide. Here we use a classical, temperature-sensitive treeline site in Western Siberia to specifically test the influence of micro-site conditions (wet versus dry) on the stationarity of climate-growth relationships in three co-existing conifer species: Larix sibirica Ledeb., Picea obovata Ledeb., and Pinus sibirica DuTour. We test two commonly used tree-ring proxies, annual tree-ring width (TRW) and maximum latewood density (MXD), using moving windows and the bootstrapped transfer function stability test (BTFS). Summer temperature is the main driver of tree growth in all three species, but non-stationarities exist in all species and both tree-ring proxies. For TRW, we found stationarity only for larch from both micro-sites, while for MXD, we found stationarity for spruce from both micro-sites, and for pine from the wet micro-site. Micro-site variability did not seem to affect stationarity in any systematic way. We highlight the necessity to systematically test the influence of different methods of stationarity tests, since BTFS was more sensitive than moving-window analysis. Taken together, our results underscore the importance of testing the assumption of stationarity for diverse micro-sites, different species and proxies at all sites prior to any tree-ring based temperature reconstruction, since even within one site results can be drastically different.

年轮代理和气候驱动因素之间的平稳（时间稳定）关系是使用年轮作为古气候档案的先决条件，但在全球范围内都发现了非平稳性。在这里，我们使用西西伯利亚的一个经典的、温度敏感的林线站点来专门测试微型站点条件（潮湿与干燥）对三种共存针叶树物种气候-生长关系平稳性的影响：Larix sibirica Ledeb。Picea obovata Ledeb., 和Pinus sibirica杜图尔。我们使用移动窗口和自举传递函数稳定性测试 (BTFS) 测试了两种常用的年轮代理，即年轮宽度 (TRW) 和最大晚材密度 (MXD)。夏季温度是所有三个物种树木生长的主要驱动力，但所有物种和两个年轮代理都存在非平稳性。对于 TRW，我们发现仅来自两个微型站点的落叶松具有平稳性，而对于 MXD，我们发现来自两个微型站点的云杉和来自湿微型站点的松树具有平稳性。微站点变异似乎没有以任何系统的方式影响平稳性。我们强调有必要系统地测试不同平稳性测试方法的影响，因为 BTFS 比移动窗口分析更敏感。综合起来，