EARTH SCIENCE > CRYOSPHERE > SEA ICE > LEADS
Any fracture or passage-way through ice which is navigable by surface
vessels. Leads and other open water areas within the sea ice pack are also
important in studies of the energy budget in the polar regions and in
local and regional climatology.
Canadian Ice Service - Environment Canada
See also Hall, D.K. and J.
Martinec. 1985. Remote Sensing of Ice and Snow, \ Chapman and Hall. London.