The Parry arc, named after the geologist John Parry, refers to a specific feature in the context of glaciology and snow dynamics. It is a type of snow accumulation pattern that occurs on the leeward side (the side away from the wind) of an obstruction, such as a mountain or a ridge. When wind blows snow, it can create depositional areas where snow collects and builds up due to the reduction of wind speed and turbulence in the sheltered area.
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