Question
What are polar stratospheric clouds (PSCs)?
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Answer
Polar Stratospheric Clouds: PSC's are formed over Antarctica. They are of two types:
Type I clouds contain some solidified nitric acid trihydrate $\left(\mathrm{HNO}_3 3 \mathrm{H}_2 \mathrm{O}\right)$ formed at - $77^{\circ} \mathrm{C}$.
Type II clouds contain some ice, formed at $-85^{\circ} \mathrm{C}$.
These clouds play an important role in ozone depletion.
Type I clouds contain some solidified nitric acid trihydrate $\left(\mathrm{HNO}_3 3 \mathrm{H}_2 \mathrm{O}\right)$ formed at - $77^{\circ} \mathrm{C}$.
Type II clouds contain some ice, formed at $-85^{\circ} \mathrm{C}$.
These clouds play an important role in ozone depletion.
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