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Crystal structure morphology as a function of temperature and water saturation Temperature range Saturation range (g/m 3) Types of snow crystal below saturation Types of snow crystal above saturation 0 °C (32 °F) to −3.5 °C (26 °F) 0.0 to 0.5 Solid plates Thin plates Dendrites −3.5 °C (26 °F) to −10 °C (14 °F) 0.5 to 1.2
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.
A snowflake is a single ice crystal that is large enough to fall through the Earth's atmosphere as snow. [1] [2] [3] Snow appears white in color despite being made of clear ice. This is because the many small crystal facets of the snowflakes scatter the sunlight between them. [4] Macro photography of a natural snowflake
Contact between a snow crystal and the supercooled droplets results in freezing of the liquid droplets onto the surface of the crystal. This process of crystal growth is known as accretion. Crystals that exhibit frozen droplets on their surfaces are often referred to as rimed. When this process continues so that the shape of the original snow ...
Ski wax enhances the ability of a ski (or other runner) to slide over snow by reducing its coefficient of friction, which depends on both the properties of the snow and the ski to result in an optimum amount of lubrication from melting the snow by friction with the ski—too little and the ski interacts with solid snow crystals, too much and ...
1675 - Friedrich Martens, a German physician, catalogues 24 types of snow crystal. [6] [7] 1681 - Donato Rossetti categorizes snow crystals in La figura della neve. 1778 - Dutch theologian Johannes Florentius Martinet diagrams precise sketches of snow crystals. [8] [9] [10] 1796 - Shiba Kōkan publishes sketches of ice crystals under a microscope.
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Falling diamond dust (Inari, Finland) Diamond dust is similar to fog in that it is a cloud based at the surface; however, it differs from fog in two main ways. Generally fog refers to a cloud composed of liquid water (the term ice fog usually refers to a fog that formed as liquid water and then froze, and frequently seems to occur in valleys with airborne pollution such as Fairbanks, Alaska ...