Tree-ring width measurements of Douglas fir from Herbrechtingen from 1922 to 2022

Wood samples from Douglas fir trees were taken using an increment borer. From each tree two opposing increment cores were taken at breast height. The sampled trees stood in an area of ~50x50 meters. Total ring width was measured and digitized. The resulting two radii measurements of each tree were visually synchronized and averaged to form a tree-ring series. Additionally, metadata were collected such as tree height, circumference and provenance (coastal, interior). The tree-ring data were used to investigate the resilience, resistance and recovery of the Douglas fir trees to severe drought events and to perform climate sensitivity analysis. This tree-ring dataset was part of a sampling campaign to assess the growth potential of Douglas fir trees until the year 2100. Annual tree growth variability until 2100 was modeled for Germany (including the river basins draining to Germany) with a spatial resolution of 12x12 km using regional climate projections ensemble.

本数据集的样本采自花旗松（Douglas fir），借助树芯钻（increment borer）完成取样。在每棵供试样树的胸高位置，采集两份相对的树芯样本。供试样木均生长于面积约50×50米的区域内。研究人员对样本的总年轮宽度进行测量并完成数字化处理。随后将每棵树获得的两份半径测量值进行目视对齐匹配，并取平均值以构建单株树木的年轮序列。此外，还采集了样木的元数据，包括树高、树干周长以及种源类型（分为沿海、内陆两类）。该年轮数据集被用于探究花旗松在极端干旱事件下的抗逆性、恢复力与恢复能力，并开展气候敏感性分析。本数据集是一项采样计划的组成部分，该计划旨在评估花旗松至2100年的生长潜力。研究团队利用区域气候预估集合（regional climate projections ensemble），以12×12千米的空间分辨率，对德国全境（含汇入德国的河流流域）内花旗松至2100年的年生长变异性进行了模拟。