These large masses of slow-moving ice occur where winter snowfall exceeds summer melt
During the spring and summer significant amounts of meltwater runs off the 
melting ice and ... As is the case with all systems, if the input fluxes exceed the 
output fluxes then... [DOC] [TLE] glacier | Britannica.com [PAR] Jul 7, 2016 ... Any large mass of perennial ice that originates on land by the ...