Leaf Area, Vegetation Biomass and Nutrient Content, Utqiagvik (Barrow), Alaska, 2012 - 2013

This dataset consists of measurements of vegetation harvested from Areas A to D of Intensive Site 1 at the Next-Generation Ecosystem Experiments (NGEE) Arctic site near Barrow, Alaska. The dataset includes i) values of leaf area index, biomass, carbon (C), nitrogen (N) and phosphorus (P) content of aboveground plant parts from 0.25 m x 0.25 m clip-plots at peak growing season and ii) fine-root biomass from 5.08-cm diameter soil cores taken throughout the active layer in the same location as the clip plots in late July-early August 2012, and iii) values of aboveground biomass and nitrogen (N) content measured from 0.1 m x 0.1 m clip-plots harvested at 2-week intervals throughout the 2013 growing season. This dataset includes five csv files and one pdf file. 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).

本数据集涵盖从美国阿拉斯加州巴罗附近的下一代生态系统实验北极（Next-Generation Ecosystem Experiments Arctic，NGEE Arctic）站点的密集试验区1的A至D区域收获的植被测量数据。数据集包含三类内容：i) 生长季峰值期，于0.25米×0.25米刈割样方中获取的地上植物部分的叶面积指数、生物量、碳（C）、氮（N）与磷（P）含量数值；ii) 2012年7月末至8月初，在与上述刈割样方相同位置的活动层内采集的直径5.08厘米土壤岩芯中的细根生物量；iii) 2013年整个生长季每两周采集一次的0.1米×0.1米刈割样方的地上生物量及氮（N）含量数值。本数据集包含5个CSV文件与1个PDF文件。下一代生态系统实验北极（NGEE Arctic）是一项研究计划，旨在通过构建对富碳北极生态系统的预测性理解及其气候反馈机制，降低地球系统模型中的不确定性。该项目由美国能源部生物与环境研究办公室资助。NGEE Arctic项目设有两处野外研究站点：1) 位于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）内的北极多边形苔原沿海区域；2) 阿拉斯加州诺姆以北苏厄德半岛的不连续永久冻土区域的多个地块。通过观测、实验及现有数据集的综合分析，NGEE Arctic为多尺度建模提供了更为完善的知识库，并助力美国能源部地球系统模型（能源极端计算地球系统模型，Energy Exascale Earth System Model，简称E3SM），尤其是其陆面模型组件（ELM）在全球泛北极尺度上改进了过程表征。