Snow-Making
Many ski slopes add to the natural snow on its slopes with artificial snow. Artificial snow is water spray in which compressed air is added. Thus, the water is broken up into a fine mist and freezes very quickly.
Low temperature required for the snow is not created a mechanism for cooling. It comes from the atmosphere. The temperature should be 30F or below. With low relative humidity, snow, can be made at a temperature of 35F (2C). This is possible because, with low humidity, part of the water evaporates. In doing so, it absorbs heat. This reduces the temperature of the water drops below the freezing point. Ice crystals (snow) are formed.
In General, on the ground must be frozen before the snow practical solutions. As a rule, are only made snow supplements natural snow...
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