In fact, it is not because the skiers in the mountains are easily burned because they are closer to the sun. Even if you rise 1.6 km, ie from Denver to the hills of Resorts Valet or Copper-Mountain, you will be less than 1 million less than 1 million hundred than the sun.
At the same time, at a height of 1.6 km, the atmosphere is thinner. Therefore, less particle prevents ultraviolet radiation that causes sunburn. The main cause of burning is snow.
When you are in the snow, most of the solar radiation is reflected from the abdomen itself. The number of radiation reflected is Albedo. In fresh snow, Albedo can be almost 95%, ie reflecting almost all solar radiation. However, as the snow gets older, the crystal becomes more rounded. Therefore, there are fewer surfaces for reflection.
In addition, a large amount of snow reflects sun radiation better than small. In addition, shallow snow rays are less than the ability to reflect.
If there are no clouds in the sky, it creates perfect conditions for obtaining tanning when skating in these mountains.
It may also be important where you are on the mountain. In the northern hemisphere, the north -facing slopes receive less direct sunlight in winter. Therefore, they melt slower.
There is more snow on the top of the mountain and it melts slower than that of the foot. Therefore, Albedo is higher than the top.
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Source: Ferra
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