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Suppose 100 units of solar radiation enters the earth's atmosphere. Based on this information, which of the following statements is absolutely correct? I. Radiation lost to space through scattering will be higher than reflected by the clouds. II. Approximately 20 units of radiation will be received by the earth's surface.

Suppose 100 units of solar radiation enters the earth's atmosphere. Based on this information, which of the following statements is absolutely correct? I. Radiation lost to space through scattering will be higher than reflected by the clouds. II. Approximately 20 units of radiation will be received by the earth's surface. Correct Answer Neither I nor II

The word "solar radiation" refers to the electromagnetic radiation (radiant energy) released by the sun. Important Points

  • The incident solar radiation on an item is referred to as insolation.
  • It is a measurement of the solar energy that is incident on a certain region over a specific time period.
  • Water vapor, dust, and ozone absorb around 23% of incoming solar energy in the atmosphere, whereas the remaining 48% travels through the atmosphere and is absorbed by the earth.
  • As a result, the Earth system absorbs around 71 percent of total solar energy. 

[ alt="solar rad and insolation" src="//storage.googleapis.com/tb-img/production/22/02/solar%20rad%20and%20insolation.PNG" style="width: 300px; height: 254px;">

Hence, neither statement I nor II is correct.

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