NOAA/WDS Paleoclimatology - Ames - Nain A+b - PCGL - ITRDB CANA005

Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives. Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets. Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll

本数据集源自国际树木年轮数据银行（International Tree Ring Data Bank）与古气候学世界数据中心（World Data Center for Paleoclimatology）的档案馆藏。多数数据集包含原始树轮测量数据（raw treering measurements）：其中绝大多数为年轮宽度数据，另有部分数据集收录早材宽度、晚材宽度或木材密度数据；同时还包含树轮年表（chronologies）——即由多份树轮样本汇编得到的单站点标准化生长指数。部分此类数据集还附带气候变量重建结果。每种数据类型均存储于独立的数据文件中，且数据类型信息已通过文件名进行编码标识。详细信息请参阅：http://www.ncdc.noaa.gov/paleo/treeinfo.htmll