Where does the snow come from?

Marina Fedotova
Marina Fedotova
February 11, 2013
Where does the snow come from?

Without snow, it is impossible to imagine winter, but where does snow come from? Despite the fact that this question is, in some way, childish, yet even adults can sometimes not answer it correctly. Under the snow refers to a special form of precipitation, which consists of ice crystals of very small sizes. Snow refers to precipitation falling on the earth’s surface.

Origin of snow

The structure of the snow always consists of a large number of ice crystals of very small sizes. At its core, snow is considered frozen water. Due to excessive humidity, the pressure at the top of the atmosphere is somewhat lower, and the air temperature is noticeably cooler, it is this phenomenon that explains where the snow and ice come from in the atmosphere. Then the steam gradually crystallizes, as a rule, it usually occurs around dust particles or other small particles. They are also called crystallization centers. Gradually, the snowflake becomes heavy and falls down.

Why is snow white

The white color of snow comes from the air that is in the snowflake.The light of all possible frequencies is reflected on the surfaces between the snowflake crystals and the air, after which it is scattered. Note that snowflakes are 95% air. This is what causes their low density and also their slow fall rate (about 0.9 km / h) to the earth's surface. The largest snowflake was registered by meteorological stations on January 28, 1887 in Fort Keog, Montana in the USA. Its diameter was 15 inches (about 38 cm). On average, snowflakes have a diameter of about 5mm, and their average weight is 0.004 grams.



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