SNOW refers to forms of ice crystals that precipitate from the atmosphere and undergo changes on the Earth's surface
It pertains to frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place, and ultimately melt, slide away.
Snow organize and develop by feeding on sources of atmospheric moisture and cold air. Snowflakes nucleate around particles in the atmosphere by attracting supercool water droplets, which freeze in hexagonal-shaped crystals
. Snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and .rime. As snow accumulates into a snow it may blow into drifts. Over time, accumulated snow metamorphoses, by sublimation and freeze-thaw Where the climate is cold enough for year-to-year accumulation, a glacier may form. Otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater
Snow develops in clouds that themselves are part of a larger weather system. The physics of snow crystal development in clouds results from a complex set of variables that include moisture content and temperatures. The resulting shapes of the falling and fallen crystals can be classified into a number of basic shapes and combinations, thereofOccasionally, some plate-like, dendritic and stellar-shaped snowflakes can form under clear sky with a very cold temperature inversion present.
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