Ice wedges resemble a giant quilt when seen from the air and form only where permafrost is found.
When lakes dry up, the unfrozen ground that was once protected beneath the lake is exposed and freezes. The ice expands upward, and ping!
When permafrost thaws, the results can include huge crater-like landforms called thermokarst slumps. We map the slumps in 3D.
Permafrost underlies most of Alaska's Arctic. Thawing of permafrost produces pits, ponds, lakes, slumps and landslides
Also known as "icing," aufeis forms by the overflow and freezing of water during the winter.
Images from remote cameras at climate stations help us document seasonal changes across Arctic parks.
Lagoons dominate the remote shorelines of northern Alaska, yet are relatively unstudied.
Marine debris is an issue of growing concern for Alaska's coastal parks. We work with partners to clean-up debris that's washed in.
Marine debris washes in on the coasts of Alaska parks. We are working to clean it up.
Glaciers in Alaska's parks are dynamic features that are vulnerable to climate change. We track changes in park glaciers.
Glaciers are enormous and dynamic features of Alaska’s parks that are rapidly changing.
Today in the valleys of the Arrigetch there are no mighty rivers of ice. Only a few scattered glaciers remain in the high peaks.
Last updated: July 19, 2018
