LBA-ECO CD-02 OXYGEN ISOTOPES OF PLANT TISSUE WATER AND ATMOSPHERIC WATER VAPOR

This data set reports the oxygen isotope signatures of water extracted from plant tissue (xylem from the stems and leaf tissue) and of atmospheric water vapor from twelve different sites (including both pasture and forest) throughout the Amazon region of Brazil. Samples were collected approximately every 4 months between 1999 and 2003 with additional samples collected monthly between January and May of 2003. In 2004 the collection of water samples from plant tissue continued at two sites, though water vapor collections were discontinued, and measurements of deuterium signatures were added to the analyses. In addition, water vapor from the troposphere was collected during a series of aircraft flights over the Tapajos National Forest in May of 2003 and analyzed for oxygen isotopes using the same methodology. There is one comma-delimited ASCII data file with this data set.本数据集收录了巴西亚马逊区域内12处不同采样点（涵盖牧场与森林生境）的植物组织（茎部木质部与叶片组织）中提取水的氧同位素特征，以及该区域大气水汽的氧同位素特征。1999年至2003年间，采样间隔约为4个月；2003年1月至5月期间额外开展了月度采样。2004年，仅保留两处采样点的植物组织水样采集工作，终止了大气水汽样品的采集，并在分析中新增了氘同位素特征的测定项目。此外，2003年5月，研究团队通过一系列飞越塔帕若斯国家森林公园（Tapajos National Forest）的航空航次采集了对流层大气水汽样品，并采用相同的分析方法测定了其氧同位素组成。本数据集附带1个逗号分隔格式的ASCII数据文件。