Tree ring and competiton data from northeast Washington, USA

Data collection methods are described in Methods. Tree-level completion data was collected in the field and tree ring data was measured in laboratory using standard techniques. Year = Calendar year of tree ring; ST_ID = Unique ID for each subject tree; Canopy_Class = Canopy position of subject tree, either dominant (DO) or intermediate (IN); ST_DBH = diameter at breast height of subject tree; HCI = Hegyi's Competition Index; DIB = Diameter inside bark; Comp_Class = Categorical grouping based on HCI; SW = avg. distance (cm) of sapwood on increment cores; Age = age at breast height when tre was sampled; Stand_ID = Unique ID for each stand; PLW_Class = Categorical grouping based on PLW; BAI = Basal area increment; BAI.rwi = Index based on BAI; EWA = Earlywood area increment; EWA.rwi = Index based on EWA; LWA = Latewood area increment; LWA.rwi = index based on LWA; PDSI = Palmer Drought Severity Index for NCDC WA Div 9; PLW = Proportion of latewood

本数据集的采集方法详见《Methods》。林木层级补全数据采自野外实地，树木年轮数据则在实验室中采用标准技术完成测定。其中，Year为对应树木年轮的公历年份（Calendar year）；ST_ID为每棵供试树木的唯一识别编号；Canopy_Class为供试树木的冠层位置，分为优势木（dominant, DO）与中间木（intermediate, IN）两类；ST_DBH为供试树木的胸径（diameter at breast height）；HCI为赫吉竞争指数（Hegyi's Competition Index）；DIB为树皮内径（Diameter inside bark）；Comp_Class为基于HCI的分类分组；SW为增量样芯上边材的平均距离，单位为厘米（avg. distance (cm) of sapwood on increment cores）；Age为供试树木采样时胸径处的树龄；Stand_ID为每个样地的唯一识别编号；PLW_Class为基于PLW的分类分组；BAI为断面积生长量（Basal area increment）；BAI.rwi为基于BAI构建的生长指数；EWA为早材面积生长量（Earlywood area increment）；EWA.rwi为基于EWA构建的生长指数；LWA为晚材面积生长量（Latewood area increment）；LWA.rwi为基于LWA构建的生长指数；PDSI为美国国家气候数据中心华盛顿州第9分区的帕尔默干旱严重度指数（Palmer Drought Severity Index for NCDC WA Div 9）；PLW为晚材占比（Proportion of latewood）。