Forced Diffusion Chamber Monitoring of Soil CO2 Fluxes from 2019 to Present at NGEE Arctic Teller Site, Mile Marker 27, Alaska

Soil CO2 efflux was monitored at the NGEE Arctic Teller Site, Mile Marker 27, in Alaska. Monitoring was performed beginning in June 2019 using EOSense forced diffusion soil CO2 flux sensors at up to six sites characterized by varying vegetation cover, topographic position, and soil temperature and moisture. Dataset includes measurements of soil CO2 flux and chamber temperature. Time interval between measurements ranges from 5 minutes to 3 hours. Included are EOSense chamber locations as *.kml and *.png files, six *.csv files with measurements, and two *.csv reporting format files.The Next-Generation Ecosystem Experiments: Arctic (NGEE Arctic), was a research effort to reduce uncertainty in Earth System Models by developing a predictive understanding of carbon-rich Arctic ecosystems and feedbacks to climate. NGEE Arctic was supported by the Department of Energy's Office of Biological and Environmental Research.The NGEE Arctic project had two field research sites: 1) located within the Arctic polygonal tundra coastal region on the Barrow Environmental Observatory (BEO) and the North Slope near Utqiagvik (Barrow), Alaska and 2) multiple areas on the discontinuous permafrost region of the Seward Peninsula north of Nome, Alaska.Through observations, experiments, and synthesis with existing datasets, NGEE Arctic provided an enhanced knowledge base for multi-scale modeling and contributed to improved process representation at global pan-Arctic scales within the Department of Energy's Earth system Model (the Energy Exascale Earth System Model, or E3SM), and specifically within the E3SM Land Model component (ELM).

本数据集的土壤二氧化碳排放通量监测工作，开展于阿拉斯加州里程标27处的NGEE北极泰勒站点（NGEE Arctic Teller Site）。监测工作始于2019年6月，采用EOSense强制扩散式土壤二氧化碳通量传感器，在最多6个植被覆盖、地形位置及土壤温湿度存在差异的站点进行。数据集包含土壤二氧化碳通量与箱室温度的实测数据，测量间隔为5分钟至3小时不等。配套文件包括标注EOSense监测箱室位置的*.kml与*.png格式文件、6份存储实测数据的*.csv文件，以及2份报告格式说明的*.csv文件。

下一代生态实验-北极项目（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）旨在通过深化对富碳北极生态系统及其气候反馈机制的预测性认知，降低地球系统模型（Earth System Models）的预测不确定性，该项目由美国能源部生物与环境研究办公室资助。

NGEE北极项目设有两个野外研究站点：其一位于阿拉斯加乌特恰维克（原巴罗）附近的北坡巴罗环境观测站（Barrow Environmental Observatory, BEO）内的北极多边形苔原沿海区域；其二位于阿拉斯加诺姆以北的苏华德半岛不连续多年冻土区的多个片区。

通过观测、实验以及与现有数据集的整合分析，NGEE北极项目为多尺度建模构建了更为完善的知识库，并助力美国能源部地球系统模型——能源极端尺度地球系统模型（Energy Exascale Earth System Model, E3SM），尤其是其陆面模型模块（E3SM Land Model Component, ELM）——在全球泛北极尺度上优化了过程表征能力。