Isotopic analysis of extracted water from a larch (Larix decidua) stand in a high mountain watershed (Vallon de Nant - Switzerland)

A total of 185 samples of soil and trees were taken from a stand of larch (Larix decidua) spanning from 1500 to 1600 m.a.s.l. in the Vallon de Nant in the Swiss canton of Vaud. Twenty individual trees and soil were sampled along two transects perpendicular to the main river channel of the Avançon de Nant at approximately midday on seven days in the foliage season between July 2017 and June 2018. The data consists of two data (csv) and one document (pdf) files. The sample data file includes the date and estimated time of sampling, the type of sample (vegetation or soil), the transect and tree ID for look-up in the tree metadata file, the soil depth in centimeters, and the determined mean and standard deviation of deuterium, oxygen-18, and oxygen-17. The tree metadata file includes the transect (north or south), the tree ID number, the latitude, longitude, elevation (meters above sea level), and tree height and diameter at breast height in centimeters. Finally, a document describing the methods in more detail is included.

本数据集于瑞士沃州（Vaud）南特谷（Vallon de Nant）内海拔1500至1600米的欧洲落叶松（Larix decidua）林分中，共采集得到185份土壤与树木样本。采样工作于2017年7月至2018年6月的叶片生长期内分7个采样日开展，每日正午前后沿垂直于Avançon de Nant主河道的两条样带，采集20株单株树木及对应土壤样本。数据集包含两份逗号分隔值（CSV）数据文件与一份便携式文档格式（PDF）文档。其中样本数据文件包含采样日期、预估采样时刻、样本类型（植被或土壤）、用于在树木元数据文件中检索的样带编号与树木ID、以厘米为单位的土壤深度，以及氘、氧-18与氧-17的测定平均值和标准差。树木元数据文件包含样带方位（北或南）、树木ID编号、纬度、经度、海拔（米，以海平面为基准）、树高与胸径（单位：厘米）。此外，数据集还附带一份详细阐述研究方法的文档。