A nearly century long (1920-2017) Siberian alder (Alnus viridis ssp. fruticosa) secondary growth record near Sagwon Bluffs Alaska, USA

This data set contains measures of growth ring widths of Siberian alder (Alnus viridis ssp. fruticosa) from along the Sagwon Bluffs, Alaska, USA that was used to address how alder respond to temperature overtime and how plant age impacts their climate sensitivity. There are six individual files. One, the growth ring width data from each cross-section or part taken from an individual Siberian alder. Two, a data set of the detrended chronology with climate data over the period of 1920-2017. Three, a data set of individual detrended secondary growth with temperature and age data over the period of 1977-2016. Four, a data set relating individual alder's first 30 years of growth to temperature and the time period it started growth in. Five, a data set of detrended growth from cross-sections taken from each Siberian alder, age class information, and temperature. Finally, a data set containing the number of ramets, nodule biomass per area, and nitrogen fixation rate.

本数据集涵盖采自美国阿拉斯加州萨格温断崖（Sagwon Bluffs）的西伯利亚赤杨（Alnus viridis ssp. fruticosa）年轮宽度测量数据，相关研究用于探讨赤杨随时间对温度的响应规律，以及植株年龄对其气候敏感性的影响。数据集共包含6个独立文件：其一为取自单株西伯利亚赤杨的各横切片或分样的年轮宽度数据；其二为附带有1920-2017年时段气候数据的去趋势年表数据集；其三为附带有1977-2016年时段温度与植株年龄数据的单株去趋势次生生长数据集；其四为关联单株赤杨前30年生长情况与温度、及其启动生长时段的数据集；其五为包含取自各西伯利亚赤杨横切片的去趋势生长数据、年龄组信息与温度数据的数据集；最后一个数据集则包含分株数、单位面积根瘤生物量及固氮速率三项指标。