First, phrase collocation
1, Chun Xue map of spring snowfall; Snowwallin drifted through the snow of childhood; Through snowfall; Snowfall algae snow algae; Winter snowfall Winter snowfall; Snowfall in summer Texas blues; Snowfall futures Snowfall futures; Snow wall map snowfall map; Before the snowfall.
Second, snow.
1 refers to the solid water falling to the ground in the form of snowflakes in the mixed cloud. Precipitation consisting of a large number of white opaque ice crystals (snow crystals) and their polymers (snow masses).
2. Snow is a natural phenomenon that water falls after condensation in the air, or refers to falling snow; Snow is the solid form of water. Snowfall only occurs under the influence of very cold temperatures and extratropical cyclones, so the probability of snowfall in subtropical and tropical areas is relatively small.
3. Snow crystals are mainly increased by condensation in the clouds. First of all, ice crystals are produced by the action of ice nuclei in cold clouds. Ice nuclei grow into snow crystals through condensation (ice crystal process), and then they can hit supercooled water droplets and grow up. The shape of snow crystal will change when it meets a large number of supercooled water droplets. Snow crystals have various shapes, which are related to the temperature and humidity of their growing environment.
4. The amount of snowfall, like all precipitation, is measured by the equivalent water layer thickness in millimeters ... In practice, it is sometimes measured by the accumulated depth of snowfall on the flat land, which is called the snow depth.