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Alternative names for snow rollers include: snow bales, [3] snow donuts, snownuts and wind snowballs. [2] Unlike snowballs made by people, snow rollers are typically cylindrical in shape, and are often hollow since the inner layers, [ 2 ] which are the first layers to form, are weak and thin compared to the outer layers.
Ice core sample taken from drill. An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier.Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper ones, and an ice core contains ice formed over a range of years.
Snow accumulation on ground and in tree branches in Germany Snow blowing across a highway in Canada Spring snow on a mountain in France. Classifications of snow describe and categorize the attributes of snow-generating weather events, including the individual crystals both in the air and on the ground, and the deposited snow pack as it changes over time.
Sampling the surface of a glacier. There is increasingly dense firn between surface snow and blue glacier ice. Firn field on the top of Säuleck, Hohe Tauern. Firn (/ f ɪər n /; from Swiss German firn "last year's", cognate with before) is partially compacted névé, a type of snow that has been left over from past seasons and has been recrystallized into a substance denser than névé.
The list of snowiest places in the United States by state shows average annual snowfall totals for the period from mid-1985 to mid-2015. Only places in the official climate database of the National Weather Service, a service of NOAA, are included in this list.
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They have the characteristic appearance of a block (slab) of snow cut out from its surroundings by fractures. These account for most back-country fatalities. Powder snow avalanches result from a deposition of fresh dry powder and generate a powder cloud, which overlies a dense avalanche. They can exceed speeds of 300 kilometers per hour (190 ...
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