NOAA/WDS Paleoclimatology - Fritts - Nicollet Lake - PIRE - ITRDB MN008

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

本数据集包含取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）档案库的树木年轮（tree ring）数据。多数数据集包含原始树木年轮测量数据（大多为年轮宽度，部分采集批次包含早材宽度、晚材宽度或木材密度），以及树木年轮年表——即由多个树木年轮样本整合得到的对应站点的标准化生长指数。部分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，数据类型编码内嵌于文件名内。详细信息请参阅：http://www.ncdc.noaa.gov/paleo/treeinfo.htmll