Question

Amount of insolation decreases from equator towards poles? Why

Answer 1

Answer:

✯reflecting on passing longer distance to atmosphere it is because of this reason that the amount of insolation decreases from equator and poles✯

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Answer 2

Insolation is a term related to the amount of solar radiation that is received by the planet.

The specific reason why insolation decreases from the equator toward the poles are as follows:

• On the equator, the sunlight almost falls vertically while sunlight is received at slanting angles on the poles.
• Sun rays are received perpendicular or almost closer to $90^{0}$ at the equator hence solar radiation is more direct.
• This phenomenon causes solar radiation to concentrate over a smaller surface areas hence causing higher warmer temperatures.
• Solar radiation at the poles is smaller in nature hence the radiation received is spread across larger surface areas and cooler temperatures.
• The heat flux density is the least at the poles and highest at the equator.  

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