Glacial Inputs
Precipitation
Meltwater
Debris
Heat
Glacial Outputs
Water Vapour
Debris
Heat
Meltwater
Mass Balance
Balance between inputs + outputs
Accumulation
Collective gain in an ice mass by processes such as snowfall, avalanches, meltwater freezing
Ablation
Collective loss of water from a glacier
Surface melting, evaporation, sublimation
Switzerland
Silvretta Glacier
20% area lost 1973-2017