This project is jointly funded by the Arctic Observing Network (AON) program and the Established Program to Stimulate Competitive Research (EPSCoR). The layer of ground above permafrost, the active layer, thaws and refreezes annually. Active layer thickness is essential in understanding cold regions as it directly affects vegetation, water flow, and other processes such as ground stability, with implications for community resilience, infrastructure, natural resource management, and socioeconomic development. For example, knowledge about the active layer is critical to building houses, roads, pipelines, and other types of infrastructure on permafrost. The data collected by this project will provide knowledge of geographic distribution and trends in a form that can be used by developers, engineers, local communities, and planners to support smart infrastructure development in Alaska under rapidly changing Arctic conditions. These data will also help to improve the reliability of global ecosystem models and satellite mission products. The Circumpolar Active Layer Monitoring (CALM) project helps to coordinate an international permafrost network, contributing to a widely used public database. This research supports national interests by enhancing understanding of the Arctic, permafrost, geostrategic and infrastructure planning, and workforce development through training students. The CALM project focuses on long-term standardized measurements of active-layer thickness (ALT) and