Quarterly Soil Core and Root Analyses from the Missouri Ozarks AmeriFlux (MOFLUX) Site, Ashland, Missouri, 2017-2023

This dataset contains quarterly soil core measurements from the Missouri Ozarks AmeriFlux (MOFLUX) site located at the University of Missouri’s Thomas H. Baskett Wildlife Research and Education Area near Ashland, Missouri. These data will be used to parameterize an ensemble of MOFLUX-optimized soil carbon-nitrogen models, used to simulate carbon (C) and nitrogen (N) cycling responses to future hydroclimatic scenarios and the trajectory of soil C stocks with concomitant forest decline. Beginning in 2017, eight soil cores were collected approximately quarterly near plot 1 of the southeast transect, near the automated soil respiration flux chambers, from 0–15 cm depth. Data are currently available through 2023 (2017-06-14 to 2023-11-13); additional observations will be appended to this dataset as they become available. Cores were analyzed for gravimetric moisture content, pH, total carbon and nitrogen, texture, microbial biomass carbon and nitrogen, and extractable dissolved organic carbon and nitrogen. This dataset contains one data file in comma separate (*.csv) format. Additional metadata are provided: one data dictionary and a file-level metadata file in comma separate (*.csv) format and a user guide in PDF (*.pdf) format.

本数据集包含来自密苏里奥扎克地区美国通量网（AmeriFlux）MOFLUX站点的季度土壤芯样测量数据，该站点坐落于密苏里大学托马斯·H·巴斯基特野生动物研究与教育区，地处密苏里州阿什兰附近。此类数据将用于参数化经MOFLUX优化的土壤碳氮模型集合，以模拟碳（C）、氮（N）循环对未来水文气候情景的响应，以及伴随森林衰退过程的土壤碳库变化轨迹。自2017年起，研究人员在东南样带1号样地附近、自动土壤呼吸通量箱周边，于0~15 cm深度处采集了8个土壤芯样，采集频率约为每季度一次。当前可用数据的时间跨度为2017年6月14日至2023年11月13日，后续新增的观测数据将陆续追加至本数据集。本次研究对采集的土壤芯样开展了多项指标分析，包括重量含水率、pH值、总碳与总氮含量、土壤质地、微生物生物量碳与氮含量，以及可提取态溶解性有机碳与氮含量。本数据集包含1个逗号分隔格式（*.csv）的数据文件，此外还附带了相关元数据：1份数据字典、1份逗号分隔格式（*.csv）的文件级元数据文件，以及1份PDF格式（*.pdf）的用户使用指南。