Basal ice layers of very cold Arctic snowpacks ( Canada).
Abstract
In the Canadian High Arctic, both the snowpack and the ground temperatures are extremely low throughout winter. During the melt period, meltwater percolating through the cold pack will refreeze as ice layers, thus releasing heat to the lower parts of the pack. When water reaches the bottom of the pack, the cold substrate again refreezes the meltwater to produce a basal ice layer.-from Authors