Why The Sun Couldn't Melt Snow?

There are few things in nature that have the ability to reflect the sunlight that falls on them. One of them is the snow. The newly formed snow reflects about 90 percent of the sunlight that falls on it. This means the Sun is powerless to dilute the clean snow. When the snow melts, it's not because of the sunlight. In the spring, the snow does not melt due to the heat of the Sun. The snow melts due to warm air that comes from the sea.

After the snow to ice, a new problem appeared. Ice can absorb about two-thirds of sunlight shone upon it, but ice is fairly transparent so light can penetrate far enough (10 meters or more) before the absorption takes place.

It's amazing the results of transparency against the rays of the Sun. If it is, the rays penetrate more deeply, the light is then absorbed in the shallow layers of ice, the Sun in the summer could quickly raise the temperature the surface layer is thin to the point of melting. And soon, the water will melt.

But as the sun broke through the thick ice layer before it can be absorbed, he could not raise the temperature to the melting point of ice fast enough. When the ice is very cold, the entire summer pass before melting occurs at all. This is what is happening today in the Antarctic, as inevitably happens in Northern Europe during the last ice age.

Just imagine, if by magic, ice changed to colored opaque, the current glacier will melt in a few years, raising sea levels up to 60 meters or more. It will inundate at least half the world's population.

Clouds reflect about 50 percent of the light that illuminates them. Ice and desert reflect a 35 percent. Vacant land is generally much lower in reflection, usually, 10 to 20 percent, depending on the nature of the vegetation.

Oceans, which cover 71 percent of the Earth's surface is part of the US, only reflects about three percent. That is why the ocean looked dark in pictures taken from the Moon or from artificial satellites.

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