FTICR, NPOC, TN, and Moisture of Variably Inundated Sediment across 48 North American Rivers

This dataset supports a broader study examining drivers of organic matter chemistry in variably inundated hyporheic zone sediments and further linking that chemistry to biogeochemical rates. The dataset provides physical and chemical sediment data collected from 48 rivers across North America. There are related data that will be published, including surficial sediment temperature time series that can be used to infer the dynamics of inundation prior to the collection of sediments. This dataset is comprised of two folders: (1) ECA2_Sediment and (2) ECA2_SitePhotos. The ECA2_Sediment folder contains: (1) file-level metadata; (2) data dictionary; (3) field metadata; (4) non-purgeable organic carbon (NPOC), total nitrogen (TN), and sediment moisture; (5) sediment sampling protocol, (6) readme, and (7) folder of high resolution characterization of organic matter from sediment extracts via 12 Tesla Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) through the Environmental Molecular Sciences Laboratory (EMSL; https://www.pnnl.gov/environmental-molecular-sciences-laboratory). The FTICR-MS files are .xml, and the data package includes instructions for using Formularity (https://omics.pnl.gov/software/formularity) and an R script to process the data based on the user's specific needs. All other files are .csv, .txt, or .pdf. The ECA2_SitePhotos folder contains a readme and site photographs taken in the field. All files are .txt or .jpg.

本数据集用于支撑一项综合性研究，该研究旨在剖析可变淹没条件下潜流带沉积物中有机质化学特征的驱动机制，并进一步建立该化学特征与生物地球化学反应速率之间的关联。本数据集包含采集自北美48条河流的沉积物物理与化学实测数据。另有相关待公开数据集，包括表层沉积物温度时间序列，可用于反演沉积物采集前的淹没动态过程。本数据集由两个文件夹组成：(1) ECA2_Sediment（ECA2沉积物文件夹）与(2) ECA2_SitePhotos（ECA2场地照片文件夹）。ECA2_Sediment文件夹包含以下内容：(1) 文件级元数据；(2) 数据字典；(3) 野外元数据；(4) 不可吹扫有机碳（non-purgeable organic carbon, NPOC）、总氮（total nitrogen, TN）及沉积物含水率数据；(5) 沉积物采样规程；(6) 说明文档；(7) 由环境分子科学实验室（Environmental Molecular Sciences Laboratory, EMSL；https://www.pnnl.gov/environmental-molecular-sciences-laboratory）提供的有机质高分辨表征文件夹，该表征通过12特斯拉傅里叶变换离子回旋共振质谱（Fourier transform ion cyclotron resonance mass spectrometry, FTICR-MS）对沉积物提取物完成。该文件夹内的FTICR-MS数据文件格式为.xml，本数据包还包含Formularity软件（https://omics.pnl.gov/software/formularity）的使用说明，以及可根据用户个性化需求处理数据的R脚本。其余所有文件格式为.csv、.txt或.pdf。ECA2_SitePhotos文件夹包含说明文档与野外拍摄的场地照片，所有文件格式为.txt或.jpg。