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The "Active layer" is the few inches of permafrost that thaw in the summer.
The "Active layer" is the few inches of permafrost that thaw in the summer.
A cold, treeless, usually lowland area of far northern regions. The lower strata of soil of tundras are permanently frozen, but in summer the top layer of soil thaws and can support low-growing mosses, lichens, grasses, and small shrubs.
Permafrost
Permafrost is the layer of permanently frozen ground that lies underneath the top soil of the tundra.
The "Active layer" is the few inches of permafrost that thaw in the summer.
The "Active layer" is the few inches of permafrost that thaw in the summer.
The top layer of soil thaws :D
No it has a layer of soil above it
Permafrost
Permafrost
it melts
Permafrost
A cold, treeless, usually lowland area of far northern regions. The lower strata of soil of tundras are permanently frozen, but in summer the top layer of soil thaws and can support low-growing mosses, lichens, grasses, and small shrubs.
In the summer, the soil thaws to some depth below the surface, but the water is trapped in the thawed soil because the permafrost zone is impermeable. Thus solifluction occurs only in the summer when the surface soil layer is thawed. In the winter the surface soil layer is frozen solid.
In the summer, the soil thaws to some depth below the surface, but the water is trapped in the thawed soil because the permafrost zone is impermeable. Thus solifluction occurs only in the summer when the surface soil layer is thawed. In the winter the surface soil layer is frozen solid.
Permafrost