UPSC Prelims 2024 Question on –Heating of Atmosphere | Solar vs Terrestrial Radiation
Q. Consider the following statements:
Statement I: The atmosphere is heated more by incoming solar radiation than by terrestrial radiation. Statement II: Carbon dioxide and other greenhouse gases in the atmosphere are good absorbers of long-wave radiation.
Which one of the following is correct in respect of the above statements?
✅ Correct Answer: (d)
Explanation:
Statement I – Incorrect: The atmosphere is heated more by terrestrial (long-wave) radiation emitted by the Earth’s surface than by incoming solar radiation. A large part of solar radiation is reflected back to space due to Earth’s albedo.
Statement II – Correct: Greenhouse gases such as carbon dioxide, methane, and water vapour are effective absorbers of long-wave (terrestrial) radiation, thereby warming the atmosphere.
