Geography • Physical GeographyHard
With reference to atmospheric radiation budgets and greenhouse gas dynamics, consider the following assertions: Assertion (A): The Earth's surface emits terrestrial radiation primarily in the longwave infrared spectrum, which is effectively absorbed by greenhouse gases like water vapor and carbon dioxide. Reason (R): Greenhouse gases are transparent to incoming shortwave solar radiation but opaque to outgoing longwave terrestrial radiation, leading to the atmospheric greenhouse effect. Which of the following is correct?
A. Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A)✓ Correct Answer
B. Both Assertion (A) and Reason (R) are correct but Reason (R) is not the correct explanation of Assertion (A)
C. Assertion (A) is correct but Reason (R) is incorrect
D. Assertion (A) is incorrect but Reason (R) is correct
💡 Solution & Explanation
Both assertion and reason are correct, and the selective absorption properties of greenhouse gases explain the planetary radiative equilibrium that maintains habitable surface temperatures. Confusing shortwave and longwave radiation properties is a common misconception in climatology. Atmospheric scientists monitor these radiative forcing components to assess anthropogenic climate change impacts.
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