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ponds photo pair
Photo Credits: Fred Dean (1976), Carl Roland (2005)
Ecoregion: Alaska Range Mountains
Change Type: Shrinking ponds
Shrinking pondsAnimation is available
Description:
This is a high altitude aerial view of the plateau between Clearwater Creek and Turtle Hill in the western area of Denali near the Muddy River. This area is characterized by shrub birch-ericaceous tundra on permafrost with patches of black spruce (Picea mariana) and white spruce (Picea glauca) along the rivers. What changes do you see in the landscape between the two image dates? From this perspective, it may be harder to pick out specific changes, or maybe this area of the landscape has undergone less change than others. In general we find that many areas underlain by shallow permafrost have not changed as much (at least visibly) as areas that are in thawed terrain. Why might that be?