Tuesday, January 11, 2005

Permafrost, Effects of water bodies

Bodies of water, lakes, rivers, and the sea have a profound effect on the distribution of permafrost. A deep lake that does not freeze to the bottom during the winter will be underlain by a zone of thawed material. If the minimum horizontal dimension of the deep lake is about twice as much as the thickness of permafrost nearby, there probably exists an unfrozen vertical


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