Atmospheric Heating & Greenhouse Gases
Question
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?
Options
Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
Statement-I is correct, but Statement-II is incorrect
Statement-I is incorrect, but Statement-II is correct
Explanation
Statement-I is incorrect because the atmosphere is primarily heated from below by terrestrial long-wave radiation, not directly by incoming short-wave solar radiation. Statement-II is correct; greenhouse gases like CO2 are mostly transparent to incoming short-wave radiation but effectively absorb the outgoing long-wave infrared radiation, causing the greenhouse effect.
Answer: (d).
Question details
Year
2024
Paper
GS Paper 1
Question
Q1
Subject
Geography
Sub-topic
Climatology & Atmosphere
Type
Assertion-Reason
Difficulty
Easy
Nature
Static
Source hint
NCERT Geography Cl.11 Ch.9
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