The key factors are the formation of the polar vortex, extremely low stratospheric temperatures leading to the formation of Polar Stratospheric Clouds (PSCs), and the presence of CFCs and their breakdown products. PSCs provide surfaces for chemical reactions that convert inactive chlorine compounds into active forms (like ClO) which catalytically destroy ozone when sunlight returns after
The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
Asked in WBCS Main Paper 4 2022 · Topic: Ozone Layer (The Antarctic Ozone Hole: Formation and Dynamics)
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Answer: B. Presence of prominent polar front and strato‐ spheric clouds; and inflow of CFCs.
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