Stable Water Isotope Data for the East River Watershed, Colorado (2014-2023)

The stable water isotope data for the East River Watershed, Colorado, consists of delta2H (hydrogen) and delta18O (oxygen) values from samples collected at multiple, long-term monitoring sites including streams, groundwater wells, springs, and a precipitation collector used to establish a local meteoric water line (LMWL) for the watershed. These locations represent important and/or unique end-member locations for which stable isotope values can be diagnostic of the connection between precipitation inputs as snow and rain and riverine export. Such locations include drainages underline entirely or largely by shale bedrock, land covered dominated by conifers, aspens, or meadows, and drainages impacted by historic mining activity and the presence of naturally mineralized rock. Developing a long-term record of water isotope values from a diversity of environments is a critical component of quantifying the impacts of both climate change and discrete climate perturbations, such as drought, forest mortality, and wildfire, on water export. Such data may be combined with stream gaging stations co-located at each surface water monitoring site to relate seasonal variations in water export to their stable isotopic signature. Data for liquid water delta2H and delta18O values are reported in units of parts per thousand (per-mil; ‰). This data package contains (1) a zip file (isotope_data_2014-2023.zip) containing a total of 69 files: 68 data files of isotope data from across the Lawrence Berkeley National Laboratory (LBNL) Watershed Function Scientific Focus Area (SFA) which is reported in .csv files per location and a locations.csv (1 file) with latitude and longitude for each location; (2) a file-level metadata (v3_20230808_flmd.csv) file that lists each file contained in the dataset with associated metadata; and (3) a data dictionary (v3_20230808_dd.csv) file that contains terms/column_headers used throughout the files along with a definition, units, and data type. There are a total of 34 locations containing isotope data. Update on 2022-06-10: versioned updates to this dataset was made along with these changes: (1) updated isotope data for all locations up to 2021-12-31 and (2) the addition of the file-level metadata (flmd.csv) and data dictionary (dd.csv) were added to comply with the File-Level Metadata Reporting Format. Update on 2022-09-09: Updates were made to reporting format specific files (file-level metadata and data dictionary) to correct swapped file names, add additional details on metadata descriptions on both files, add a header_row column to enable parsing, and add version number and date to file names (v2_20220909_flmd.csv and v2_20220909_dd.csv). Update on 2023-08-08: Updates were made to both the data files and reporting format specific files. New available anion data was added, up until 2023-03-13. The file level metadata and data dictionary files were updated to reflect the additional data added.科罗拉多州东河流域（East River Watershed）的稳定水同位素数据集，包含从多个长期监测站点采集的样品的δ²H（氢）和δ¹⁸O（氧）值，监测站点涵盖溪流、地下水井、泉水，以及用于建立该流域本地大气降水线（local meteoric water line, LMWL）的降水收集器。这些点位代表了重要且/或独特的端元点位，其稳定同位素数值可用于示踪降雪、降雨形式的降水输入与河流径流输出之间的水文联系。此类站点包括完全或主要以页岩基岩为基底的流域、以针叶林、美洲山杨或草甸为主的地表覆盖区域，以及受历史采矿活动影响且赋存天然矿化岩石的流域。构建覆盖多样生境的长期水同位素记录，是量化气候变化与离散气候扰动（如干旱、森林死亡与野火）对径流输出影响的核心环节。此类数据可与每个地表水监测站点配套的河道测流站结合，将径流输出的季节变化与其稳定同位素特征建立关联。液态水的δ²H和δ¹⁸O值以千分比（per-mil；‰）为单位进行报告。本数据包包含以下内容：(1) 压缩包isotope_data_2014-2023.zip，内含总计69个文件：68个按站点分类的.csv格式同位素数据文件，涵盖劳伦斯伯克利国家实验室（Lawrence Berkeley National Laboratory, LBNL）流域功能科学重点区（Watershed Function Scientific Focus Area, SFA）全域的采样数据，以及1个记录所有站点经纬度信息的locations.csv文件；(2) 文件级元数据文件v3_20230808_flmd.csv，列出数据集中所有文件及其关联元数据；(3) 数据字典文件v3_20230808_dd.csv，收录所有文件中使用的术语/列标题，并附带其定义、单位与数据类型。本数据集共涵盖34个带有同位素数据的监测站点。2022年6月10日更新：本数据集完成版本化更新，具体变更如下：(1) 更新所有站点至2021年12月31日的同位素数据；(2) 新增文件级元数据文件flmd.csv与数据字典文件dd.csv，以符合文件级元数据报告格式规范。2022年9月9日更新：对报告格式专用文件（文件级元数据与数据字典）进行修订，具体包括：修正了文件名互换的错误，为两个文件补充元数据描述细节，新增用于数据解析的header_row列，并在文件名中添加版本号与日期（v2_20220909_flmd.csv与v2_20220909_dd.csv）。2023年8月8日更新：对数据文件与报告格式专用文件均进行更新。新增截至2023年3月13日的阴离子监测数据，并更新文件级元数据与数据字典文件以反映新增数据内容。