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thermokarst photo pair
Photo Credits: Larissa Yocum (2002), Larissa Yocum (2008)
Ecoregion: Alaska Range Mountains
Change Type: Permafrost dynamics
Permafrost dynamicsAnnotation is available
Although this photo pair does not line up exactly, you will understand why the photographer had a difficult time once you see how much this area changed in just six years! View the annotation for help lining up features. Thermokarst topography is that which develops when permafrost (ground that remains frozen throughout the year) begins to melt. Because it often represents a major change in the drainage patterns of a site, it can have drastic effects on vegetation that occurs in the area.