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6 March, 13:28

15) Very cold climates occur at Earth's North and South Poles because the polar regions

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  1. 6 March, 13:40
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    Because the polar regions receive low-angle insolation.

    Insolation is the amount of solar radiation received by a given area. The Sun is always low on the horizon. The low Sun angle makes the beam of solar radiation to travel a longer distance from upper troposphere to reach earth's surface as compared to when it is directly overhead. In this case, the radiations are scattered and reflected more by the atmosphere and spread over a larger area. Thus, the intensity of solar radiation is very less at polar regions than near the equatorial region. This is the reason of very cold climates at polar regions.
  2. 6 March, 15:19
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    Very cold climates occur at Earth's North and South Poles because the polar regions receive low - angle insolation.
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