Q. Consider the following:
Assertion (A): Sudden Stratospheric Warming (SSW) is a rapid temperature rise (up to 50°C) in the stratosphere, about 10–50 km above Earth’s surface. These events can weaken or even reverse the polar vortex winds during winter in the Northern Hemisphere.
Reason (R): Strong upward-propagating Rossby waves can break in the upper atmosphere, disrupting the polar vortex and causing rapid warming in the stratosphere.
Select the correct code:

[A] Both A and R are true, and R is the correct explanation of A

[B] Both A and R are true, but R is not the correct explanation of A

[C] A is true, but R is false

[D] A is false, but R is true

Answer: A
Notes:

Explanation: SSW events occur when Rossby waves disturb and weaken the polar vortex. If the disturbance is strong, the westerly winds can slow dramatically or even reverse, leading to a split or displacement of the vortex and sharp warming of the stratosphere.

Source- newsweek

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