Active layer thickness in the watershed of the Yukon River (Indigenous Observation Network), 2019.

The dataset presents results of measurements of the thickness of the active layer (ALT) as a part of a continuation of the Indigenous Observing Network (ION) project (ION 2.0) led by the Yukon River Intertribal Watershed Council (YRITWC) in partnership with the University of Alaska-Fairbanks. ION 2.0 continues the measurements of water quality constituents and expands the observation and monitoring program to include measurements of changes in the state of permafrost due to dynamics of the ALT at numerous of the long-term water quality monitoring sites at the communities along the Yukon River. The ION project has documented the long-term changes in major ion chemistry that have occurred over three decades throughout the Yukon River Watershed. The investigators have interpreted these changes as being driven by thawing of discontinuous permafrost throughout this large Arctic watershed and complementary measurements of the active layer will support further interpretation and modelling. This project involves significant co-production of knowledge with members of Indigenous communities and capacity building through training in sampling methods, and sample and data analysis.本数据集收录了活动层（active layer, ALT）厚度的测量结果，作为由育空河跨部落流域委员会（Yukon River Intertribal Watershed Council, YRITWC）牵头、与阿拉斯加大学费尔班克斯分校合作开展的原住民观测网络（Indigenous Observing Network, ION）项目（ION 2.0）的延续工作内容。ION 2.0延续了原有的水质组分测量工作，并将观测监测范围拓展至育空河沿岸社区的多个长期水质监测点位，新增针对活动层动态变化引发的永久冻土状态变化的测量内容。ION项目已完整记录了育空河流域三十余年间主要离子化学特征的长期演变，研究团队将此类演变归因于这片大型北极流域内不连续永久冻土的消融，而本次活动层的补充测量将为后续的演变解释与模型构建提供支撑。本项目与原住民社区成员开展了深度知识协同共创，并通过采样方法、样本处理与数据分析相关培训完成了能力建设。