Hydrology & Surficial Geology - Permafrost | Alaska Division of ...
Permafrost is found beneath nearly 85 percent of Alaska. It is thickest and most extensive in arctic Alaska north of the Brooks Range, present virtually everywhere and extending as much as 2,000 feet below the surface of the Arctic Coastal Plain.
Thawing permafrost threatens Alaska Native villages : NPR
2024年4月3日 · Alaska Native communities have been raising the alarm for years, warning that thawing permafrost and erosion threaten their ability to stay on the land where their families have lived for...
In a Tunnel Beneath Alaska, Scientists Race to Understand Disappearing ...
2020年5月4日 · As climate change warms soil temperatures across Alaska, too, the Fox tunnel probably contains some of the most protected and coldest permafrost in the area. How long that will remain true is...
Thawing permafrost is an existential threat for Alaska …
2024年9月9日 · Foss is the liaison for the Permafrost Pathways project in her hometown of Akiak. Scientists from the nonprofit joined Foss last month to measure the erosion along the bank using high resolution...
Permafrost: A Building Problem in Alaska
Constructing buildings in Western, Interior and Northern Alaska requires awareness of permafrost and knowledge of specialized building techniques. Disturbing permafrost carelessly may cause melting, resulting in uneven foundation settling and disastrous consequences for the building.
Permafrost - Alaska Nature and Science (U.S. National Park Service)
2024年4月3日 · Permafrost is permanently frozen ground that underlies much of the landscape in the Arctic. It affects nearly everything in the Arctic ecosystem, including soils, vegetation, water, and wildlife. During summer months, the top layer of soil thaws creating a …
Permafrost - Alaska Department of Fish and Game
About 85% of Alaska's land area is underlain by permafrost. Permafrost is a powerful influence on tundra life. In summer, it traps a layer of water close to the surface, keeping many tundra soils soggy. It cools the soil and the roots of tundra plants, slowing decomposition and growth.
A disappearing act in Alaska | U.S. Geological Survey - USGS.gov
2022年7月19日 · Underneath much of Alaska’s forests sits permafrost, or permanently frozen soil. “Permafrost is ground that stays frozen year-round for at least two consecutive years,” Jones, a research geologist with the U.S. Geological Survey, said.
Permafrost - U.S. National Park Service
2023年8月17日 · Many parts of Alaska have a hidden underground world of frozen ground. The depth and extent of this “permafrost” varies by location, depending on average air temperatures, soil types, topography, and surface vegetation. Frozen ground is stable, providing a solid foundation for roads and buildings.
Permafrost in Alaska
In Alaska, mean permafrost temperatures range from around -10 °C (14 °F) in the northernmost parts of the state to just below freezing in areas more south (Romanovsky et al., 2017). Map of permafrost zone in Alaska.