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.本数据集支撑一项更广泛的研究，该研究聚焦于周期性淹水潜流带沉积物内有机质化学特征的驱动机制，并进一步将该化学特征与生物地球化学反应速率建立关联。本数据集涵盖从北美48条河流采集的沉积物物理与化学实测数据。另有相关关联数据集即将发布，其中包含表层沉积物温度时间序列，可用于反推沉积物采集前的淹水动态。 本数据集包含两个文件夹：(1) ECA2_Sediment（ECA2_沉积物）；(2) ECA2_SitePhotos（ECA2_站点照片）。 ECA2_Sediment文件夹内包含以下内容：(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；(5) 沉积物采样方案；(6) 自述文件；(7) 高分辨率有机质表征子文件夹：该子文件夹通过环境分子科学实验室（Environmental Molecular Sciences Laboratory, EMSL；https://www.pnnl.gov/environmental-molecular-sciences-laboratory）的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）对沉积物提取物开展分析。 FTICR-MS文件格式为.xml，本数据包附带Formularity（https://omics.pnl.gov/software/formularity）使用说明，以及一份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文件夹包含自述文件与野外拍摄的站点照片，所有文件格式为.txt或.jpg。