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permafrost photo pair
Photo Credits: Fred Dean (1976), NPS (2005)
Ecoregion: Alaska Range Mountains
Change Type: Permafrost dynamics
Permafrost dynamicsAnimation is available
The flat bench-like area in the middle of this photo pair is apparently resistant to the invasion of woody vegetation from the sloped areas around it. Depth to permafrost on the bench is likely quite shallow, making it a difficult place for woody plants to grow.