Answer: All processes that add to the input of snow or ice to a glacier. Observations from the Decade glacier, Baffin Island, suggest that accumulation is greatest in shaded upland areas. The accumulation zone or accumulation sub system , is that part of a glacier between the firn line and the source where the input of snow, firn, and ice exceeds losses by ablation . The lower limit of the accumulation zone is at the equilibrium line .
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