Abstract Tree rings are a natural archive containing valuable information about environmental changes. Among the most sensitive ecosystems to such changes are high-mountain forests. Tree-ring series from such locations are exceptionally valuable both for climate reconstructions and for studying the effects of climate changes on forest ecosystems. The objective of our study is to present new long tree-ring width chronologies of Pinus peuce Griseb. from several locations at Pirin Mountains in southwestern Bulgaria, to explore their correlation with monthly temperatures and precipitation in the research area and to assess their potential for climate reconstruction. We built three long-term index chronologies for the radial increment of P. peuce from treeline locations in the study region. The longest chronology spans 675 years. We studied the impact of monthly air temperature and precipitation on its growth for the past 86 years using multiple regression analysis. Our analysis shows that P. peuce growth is positively influenced by high temperatures at the end of the previous growing season, especially at the two sites in Banderitsa valley until the middle of the 1970s, and negatively affected by cold winters. In some of the sample plots its growth was also positively correlated with high summer temperatures. However, even at these high altitudes in some of the locations on steep slopes P. peuce showed signs of negative impact of drought during the hottest summer months (especially in August). Our chronologies contribute to the paleoclimatic record for southwestern Bulgaria, which could provide baseline information about past climate variability and improve our understanding of current and future environmental changes.

中文翻译：

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灰松的树状气候分析。在保加利亚皮林山脉的亚高山和林线位置

摘要 年轮是包含有关环境变化的宝贵信息的自然档案。对这种变化最敏感的生态系统是高山森林。这些地点的年轮系列对于气候重建和研究气候变化对森林生态系统的影响都非常有价值。我们研究的目的是展示新的长年轮宽度的松树Griseb 年表。从保加利亚西南部皮林山脉的几个地点，探索它们与研究区每月温度和降水的相关性，并评估它们对气候重建的潜力。我们为研究区域内林线位置的 P. peuce 径向增量建立了三个长期指数年表。最长的年表跨越了 675 年。我们使用多元回归分析研究了过去 86 年中每月气温和降水对其生长的影响。我们的分析表明，P. peuce 的生长受到上一个生长季节末高温的积极影响，特别是在 1970 年代中期之前在 Banderitsa 山谷的两个地点，并受到寒冷冬季的负面影响。在一些样地中，它的生长也与夏季高温呈正相关。然而，即使在这些高海拔地区的一些陡坡上，P. peuce 在最热的夏季月份（尤其是 8 月）也显示出干旱的负面影响迹象。我们的年表有助于保加利亚西南部的古气候记录，