Seasonal soil active layer measurements from a Circumpolar Active Layer monitoring (CALM) grid, (U32B) Sagwon Hills MAT, Alaska, 1995-2023

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。本站点是该监测网络的组成成员之一，该网络通过协同协作，统一规范典型未受干扰永久冻土景观区的融沉测量数据采集与共享流程。本数据集包含通过机械探杆法获取的长期空间融深观测数据，观测日期由文件列标题标注。为保障记录内数据的相对一致性，季末测量日期均落在融盛期（8月中旬至9月中旬）内的同一儒略历周区间内。需特别说明的是，用于表征活动层厚度的年度最大融深日期，会随年份与站点的不同而发生变化。