Seasonal soil active layer measurements from a Circumpolar Active Layer monitoring (CALM) grid, (U7a) Betty Pingo, Alaska, 1995-2024

This site is registered with the Circumpolar Active Layer Monitoring (CALM) program. It is one among a network of sites that represent a coordinated effort to standardize the collection and access to thaw measurements in representative undisturbed permafrost landscapes. This dataset contains long-term spatial thaw depth observations using mechanical probing on dates indicated by file column headers. To ensure relative consistency within the record, end-of-season measurement dates are within the same Julian calendar week during the height of the thaw season (mid-August to mid-September). It is important to note that the date of maximum annual thaw, interpreted as the active layer thickness, can vary from year to year and between sites.

本站点已注册加入环极活动层监测（Circumpolar Active Layer Monitoring, CALM）计划。该计划搭建了多站点观测网络，通过协同合作标准化典型未受干扰永久冻土景观区的解冻观测数据采集与共享流程。本数据集包含采用机械探杆法获取的长期空间解冻深度观测数据，观测日期由文件列标题标注。为保障数据集内部数据的相对一致性，季末观测日期均统一在解冻高峰期（8月中旬至9月中旬）的同一儒略历周内。需要特别说明的是，用以表征活动层厚度的年度最大解冻日期，会因年份与站点的不同而存在差异。