Thaw Lakes as Evidence of Global Climate Change and
Underlying the Arctic
plains is a thick, unbroken layer of
permafrost. Water that melts on top of the permafrost collects into
what are called "thaw lakes".
These landforms result from thawing of ice-rich permafrost or the
snow and ice,
but the frozen ground underneath prevents the water from draining away.
Water pools in a depression and its presence begins to further thaw
the permafrost underneath and along the lake edges, gradually extending