Leaf Carbon and Nitrogen Content, Seward Peninsula, Alaska, 2014

Carbon and nitrogen content of leaves sampled from locations on the Council, Kougarok and Teller roads, Seward Peninsula, Alaska. Species not fully identified in all cases, but include samples from the genera: Alnus, Arctagrostis, Arctophila, Arctostaphylos, Betula, Carex, Eriophorum, Petasites, Picea, Populus, Rubus, Salix, Saxifraga and Vaccinium. Locations along the Council, Kougarok and Teller roads, Seward Peninsula, Alaska. Samples were collected from various locations as part of reconnaissance field work prior to establishment of formal NGEE Arctic study sites between August 22, 2014 and August 24, 2014. There is a single datafile in .csv format. 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).

本数据集包含美国阿拉斯加州苏厄德半岛Council路、Kougarok路和Teller路沿线采集的叶片样品的碳、氮含量数据。并非所有样品的物种均已完成完全鉴定，其涵盖的属包括：桤木属（Alnus）、极地禾属（Arctagrostis）、北极蓼属（Arctophila）、熊果属（Arctostaphylos）、桦木属（Betula）、苔草属（Carex）、羊胡子草属（Eriophorum）、蜂斗菜属（Petasites）、云杉属（Picea）、杨属（Populus）、悬钩子属（Rubus）、柳属（Salix）、虎耳草属（Saxifraga）以及越橘属（Vaccinium）。采样地点位于美国阿拉斯加州苏厄德半岛的上述三条道路沿线。样品采集工作于2014年8月22日至8月24日期间开展，为正式建立下一代北极生态系统实验（Next-Generation Ecosystem Experiments: Arctic，简称NGEE Arctic）研究站点前的踏勘野外工作的一部分。本数据集包含单个.csv格式数据文件。
下一代北极生态系统实验（NGEE Arctic）是一项旨在通过构建对富碳北极生态系统及其气候反馈机制的预测性理解，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项目设有两个野外研究站点：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，简称BEO）内的北极多边形苔原沿海区域；2）位于美国阿拉斯加州诺姆以北苏厄德半岛不连续多年冻土区的多处区域。通过观测、实验以及与现有数据集的整合分析，NGEE Arctic为多尺度建模提供了更为完善的知识库，并推动了美国能源部能源极端尺度地球系统模型（Energy Exascale Earth System Model，简称E3SM），尤其是其E3SM陆面模型组件（ELM）在全球及泛北极尺度上的过程表征精度提升。