Shared Enterprise Geodata and Services (SEGS) provides an EPA-curated collection of recommended geodata assets that are nationally relevant and support the Agency’s mission to protect human health and the environment. By connecting EPA users with curated datasets and promoting service reuse, SEGS aims to enhance information access, reduce data-storage costs, and improve the consistency and quality of data at the US EPA.

Developed by the U.S. EPA Office of Air and Radiation, this content item depicts changes in permafrost temperature per decade for long-term borehole sites in Alaska from 1978-2020, based on data published by the University of Alaska (2021). As the circles get larger, the rate of warming per decade increases. The blue circle represents a cooling trend. Borehole measurement depths range from 49 to 85 feet. For more information, please visit the U.S. EPA climate change indicators webpage. These data and their corresponding metadata records can be downloaded from the EPA Environmental Dataset Gateway (EDG).