Organic Carbon Transformation and Mercury Methylation in Tundra Soils from Barrow Alaska

This dataset includes information on soil labile organic carbon transformation and mercury methylation for tundra soils from Barrow, Alaska. The soil cores were collected from high-centered polygon (trough) at BEO and were incubated under anaerobic laboratory conditions at both freezing and warming temperatures for up to 8 months. Soil organic carbon including reducing sugars, alcohols, and organic acids were analyzed, and CH4 and CO2 emissions were quantified. Net production of methylmercury and Fe(II)/Fe(total) ratio were also measured and provided in this dataset. This dataset includes two files, one csv and one 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).本数据集涵盖美国阿拉斯加州巴罗（Barrow）地区苔原土壤的土壤活性有机碳转化与汞甲基化相关研究数据。实验所用土壤岩芯采自巴罗环境观测站（Barrow Environmental Observatory, BEO）的高中心多边形（槽型）区域，随后在厌氧实验室条件下，分别于冷冻与升温温度梯度中培养长达8个月。 研究团队对土壤有机碳组分（包括还原糖、醇类及有机酸）进行了分析，并对甲烷（CH4）与二氧化碳（CO2）的排放通量进行了定量测定。本数据集同时收录了甲基汞净生成量与亚铁/总铁（Fe(II)/Fe(total)）比值的测定结果。 本数据集包含两个文件，分别为1个CSV格式文件与1个PDF格式文件。 下一代北极生态系统实验（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）是一项旨在通过构建富碳北极生态系统的预测性认知及其气候反馈机制，以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项目共设有两个野外研究站点：其一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（BEO）北极多边形苔原沿海区域；其二坐落于阿拉斯加州诺姆以北苏华德半岛的不连续多年冻土区的多个地块。 项目团队通过观测、实验及与现有数据集的综合分析，为多尺度建模构建了更为完善的知识库，并助力美国能源部地球系统模型（能源极端尺度地球系统模型，Energy Exascale Earth System Model, E3SM），尤其是其E3SM陆面模型组件（ELM），提升了全球泛北极尺度下的过程表征精度。