Surface and Active Layer Pore Water Chemistry from Ice Wedge Polygons, Utqiagvik (Barrow), Alaska, 2013-2014

This data set reports the results of spatial surveys of aqueous geochemistry conducted at Intensive Site 1 of the Barrow Environmental Observatory in 2013 and 2014 (Herndon et al., 2015). Surface water and soil pore water samples were collected from multiple depths within the tundra active layer of different microtopographic features (troughs, ridges, center) of a low-centered polygon (Area A), high-centered polygon (Area B), flat-centered polygon (Area C), and transitional polygon (Area D). Reported analytes include dissolved organic and inorganic carbon, dissolved carbon dioxide and methane, major inorganic anions, and major and minor cations. This dataset contains one csv file 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).

本数据集报告了2013年与2014年在巴罗环境观测站（Barrow Environmental Observatory）密集研究站点1开展的水地球化学空间调查结果（Herndon等，2015）。研究人员从低中心多边形苔原（A区）、高中心多边形苔原（B区）、平中心多边形苔原（C区）及过渡型多边形苔原（D区）的不同微地形特征（槽谷、脊岭、中心区域）的苔原活动层内多深度采集了地表水与土壤孔隙水样本。本次公开的分析物包括溶解性有机碳与无机碳、溶解性二氧化碳与甲烷、主要无机阴离子，以及主要阳离子与微量阳离子。本数据集包含1个逗号分隔值（CSV）文件与1个便携式文档格式（PDF）文件。

下一代北极生态系统实验（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）是一项研究计划，旨在通过深化对富碳北极生态系统的预测性认知及其对气候的反馈效应，降低地球系统模型的不确定性。该项目由美国能源部生物与环境研究办公室资助。NGEE Arctic拥有两个野外研究站点：1）位于阿拉斯加州乌特恰维克（原巴罗，Utqiagvik (Barrow)）附近北坡的巴罗环境观测站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个区域。

通过观测、实验与现有数据集综合分析，NGEE Arctic为多尺度建模提供了增强型知识库，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），尤其是其陆面模型组件（ELM）在全球泛北极尺度下的过程表征精度提升。