Topography, surface water distribution and subsurface structure in 2023 across an Arctic coastal tundra site near Utqiagvik, Alaska

Subsurface electrical resistivity tomography (ERT), active layer thickness measurements, photogrammetry, and topographic data were collected in September 2023 along a 475 m long, 20 m wide corridor that traverses various polygon types within the Barrow Environmental Observatory (BEO) on the Alaskan Arctic Coastal Plain, approximately 4 miles from the Beaufort Sea near Utqiaġvik, Alaska. These measurements were designed to assess decadal changes in surface water distribution, topography, and subsurface structure across this dynamic landscape. This archive contains the datasets acquired in 2023 and references to the datasets acquired previously at the same location. The ERT survey was conducted along the 475 m transect using 0.5 m electrode spacing and a roll-along acquisition strategy. Thaw layer thicknesses were measured with a tile probe along the same transect. Photogrammetry data were acquired using an unoccupied aerial vehicle (UAV) and were used to generate a digital elevation model and an RGB mosaic. A real-time kinematic (RTK) GPS was used to survey the ERT electrodes and the ground control points for the aerial imagery. The dataset contains 5 *.csv data files, 6 *.csv metadata files, and 6 *.tif 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).

2023年9月，研究团队在阿拉斯加北极海岸平原巴罗环境观测站（Barrow Environmental Observatory, BEO）沿一条长475米、宽20米的廊道采集了地下电阻率层析成像（Subsurface Electrical Resistivity Tomography, ERT）、活动层厚度测量、摄影测量及地形数据。该观测站距阿拉斯加州乌特恰维克（Utqiagvik，旧称巴罗）附近的波弗特海（Beaufort Sea）约4英里，廊道穿越了多种多边形地貌类型。
本次测量旨在评估该动态景观下地表水分布、地形及地下结构的十年尺度变化。本数据集存档包含2023年采集的相关数据，以及此前在同一地点采集的数据集的引用信息。
ERT测量沿该475米样线开展，电极间距为0.5米，采用滚动采集策略。活动层厚度采用探杆沿同一样线进行测量。摄影测量数据通过无人驾驶飞行器（Unoccupied Aerial Vehicle, UAV）采集，用于生成数字高程模型与RGB镶嵌图。研究人员使用实时动态（Real-Time Kinematic, RTK）GPS对ERT电极及航空影像的地面控制点进行了测量。本数据集包含5个*.csv数据文件、6个*.csv元数据文件及6个*.tif文件。
下一代北极生态系统实验计划（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）旨在通过建立对富碳北极生态系统的预测性认知及其对气候的反馈机制，降低地球系统模型（Earth System Models）的不确定性。该计划由美国能源部生物与环境研究办公室（Department of Energy's Office of Biological and Environmental Research）资助。NGEE Arctic项目设有两个野外研究站点：1）位于阿拉斯加州乌特恰维克（巴罗）附近北坡的巴罗环境观测站（BEO）内的北极多边形苔原海岸区域；2）位于阿拉斯加州诺姆（Nome）以北苏厄德半岛（Seward Peninsula）的不连续多年冻土区的多处区域。通过观测、实验及与现有数据集的综合分析，NGEE Arctic为多尺度建模提供了更完善的知识库，并助力美国能源部地球系统模型——即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改进过程表征。