Influences and Interactions of Inundation, Peat, and Snow on Active Layer Thickness: Modeling Archive

The Advanced Terrestrial Simulator was used to simulate thermal hydrological conditions across varied environmental conditions for an ensemble of 1D models of Arctic permafrost. The thickness of organic soil is varied from 2 to 40cm, snow depth is varied from approximately 0 to 1.2 meters, water table depth was varied from -51cm below the soil surface to 31 cm above the soil surface. A total of 15,960 ensemble members are included. Data produced includes the third and fourth simulation year: active layer thickness, time of deepest thaw depth, temperature of the unfrozen soil, and unfrozen liquid saturation, for each ensemble member. Input files used to run the ensemble are also included. File formats in the data package: .py, .h5, .xml, .exo, .txt, and .pdf.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).

本数据集采用高级陆地模拟器（Advanced Terrestrial Simulator），针对北极多年冻土一维模型集合，在多样环境条件下开展热水文过程模拟。模拟设置的可变参数包括：有机土壤厚度范围为2至40厘米，积雪深度范围约为0至1.2米，地下水位埋深范围为地表下51厘米至地表上31厘米。本数据集共包含15960个集合成员。产出的模拟数据涵盖每个集合成员在模拟第3、第4年的相关结果：活动层厚度、最大解冻深度出现时间、非冻结土壤温度以及非冻结液态饱和度。同时附带用于运行该集合模拟的输入文件。数据包内包含的文件格式有：.py、.h5、.xml、.exo、.txt 及 .pdf。
下一代北极生态系统实验计划（Next-Generation Ecosystem Experiments: Arctic, 简称NGEE Arctic）是一项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，降低地球系统模型不确定性的研究项目。该项目由美国能源部生物与环境研究办公室资助。
NGEE Arctic项目设有两处野外研究站点：1）位于美国阿拉斯加州乌特恰维克（原巴罗）附近北坡的巴罗环境观测站（Barrow Environmental Observatory, BEO）北极多边形苔原沿海区域；2）位于阿拉斯加州诺姆以北苏华德半岛不连续多年冻土区的多处区域。
通过野外观测、受控实验以及与现有数据集的整合分析，NGEE Arctic项目为多尺度建模构建了更完善的知识库，并推动了美国能源部地球系统模型——即能源极值计算地球系统模型（Energy Exascale Earth System Model, 简称E3SM）——在全球泛北极尺度下的过程表征能力提升，尤其是针对E3SM的陆面模型模块（ELM）。