Paper 1 · People, Development and Environment
UGC NET December 2023 (13.12.2023) Shift-I
Which one of the following is responsible for the negative forcing or cooling of the atmosphere?
AWater vapour
BTropospheric Ozone
CStratospheric Ozone ✓ Correct
DBlack carbon
Correct answer: (C) Stratospheric Ozone — Stratospheric ozone is associated with negative forcing or cooling, so that is the answer.
Explanation
★Stratospheric ozone is associated with negative forcing or cooling, so that is the answer.
★Radiative forcing measures how a factor warms or cools the atmosphere.
★Stratospheric ozone contributes a small negative, or cooling, forcing.
★Water vapour is a strong greenhouse gas that warms the atmosphere.
★Tropospheric ozone and black carbon both cause warming, a positive forcing.
★So among the choices, stratospheric ozone is linked to the cooling effect.
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