Vital Sign Videos

These Vital Sign Videos are housed on the Alaska NPS YouTube Channel.
Audio described versions of these videos are available on this channel.

Landscape Processes

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  Ice Wedges

  Ice wedges resemble a giant quilt when seen from the air and form only where permafrost is found.

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  Pingos

  When lakes dry up, the unfrozen ground that was once protected beneath the lake is exposed and freezes. The ice expands upward, and ping!

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  Permafrost Slumps in 3D

  When permafrost thaws, the results can include huge crater-like landforms called thermokarst slumps. We map the slumps in 3D.

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  Thermokarst in Alaska's Arctic

  Permafrost underlies most of Alaska's Arctic. Thawing of permafrost produces pits, ponds, lakes, slumps and landslides

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  Aufeis in Alaska's Arctic

  Also known as "icing," aufeis forms by the overflow and freezing of water during the winter.

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  Seasonal Changes in Arctic Parks

  Images from remote cameras at climate stations help us document seasonal changes across Arctic parks.

Water

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  Lagoons of Arctic Alaska

  Lagoons dominate the remote shorelines of northern Alaska, yet are relatively unstudied.

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  Cleaning Up Marine Debris

  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.

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  What is Marine Debris?

  Marine debris washes in on the coasts of Alaska parks. We are working to clean it up.

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  Alaska Glaciers Status and Trends

  Glaciers in Alaska's parks are dynamic features that are vulnerable to climate change. We track changes in park glaciers.

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  Glaciers - Why Should We Care?

  Glaciers are enormous and dynamic features of Alaska’s parks that are rapidly changing.

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  Arrigetch Glaciers

  Today in the valleys of the Arrigetch there are no mighty rivers of ice. Only a few scattered glaciers remain in the high peaks.