Alaska's Permafrost Soils Warming Rapidly, Posing Climate and Infrastructure Risks

New research from Washington State University reveals that Alaska's soils are warming quickly and at considerable depth, with the fastest increases occurring in the state's permafrost region. This trend, documented between 1997 and 2023, could accelerate climate change by releasing carbon dioxide and methane as permafrost thaws, and also undermine the stability of crucial infrastructure like roads and buildings.

The study, published in Frontiers in Climate, synthesized air and soil temperature data from 43 weather stations across Alaska over 27 years. It found that air temperatures in permafrost regions rose at 1.15 degrees Celsius per decade, while soil temperatures increased at 0.64 degrees Celsius per decade. Lead author Erin Oliver, a postdoctoral research associate at WSU, noted that soil warming rates were not slowing deeper in the soil; in fact, 100% of weather stations in the permafrost region showed a warming trend at a depth of 4 feet (1.2 meters).

Winter snow cover plays a key role, with deeper snow at lower latitudes slowing warming rates. In the permafrost region, most warming occurred in winter, while lower latitudes experienced more summer warming, which could impact growing seasons. Co-author Claire Phillips, a WSU research soil scientist, highlighted the "upsetting" finding of 2 to 3 degrees Celsius per decade warming at 4 feet depth during winter months in permafrost soils.

What to watch: Policy and planning responses to permafrost thaw and its implications for Alaskan communities.

Editor's note: The article effectively synthesizes the study's data, context, and expert quotes into a concise, professional report.

This article is AI-generated and fact-gated. Original reporting: Phys.org