All processes, which include snowfall, condensation, avalanching, snow transport by wind, and freezing of liquid water, that add snow or ice to a glacier, floating ice, or snow cover. The term also includes the amount of snow or other solid precipitation added to a glacier or snowfield by these processes.
although there is very little precipitation at Halley, large amounts of snow is blown onto the ice shelf. Items on the surface become buried and regularly have to be dug out and lifted onto the surface. There can be as much as two metres of accumulation in a year.