What is the name of the phenomenon where the polar vortex splits or weakens, allowing cold air to move southward?
A. Sudden stratospheric warming
B. Polar amplification
C. Polar vortex collapse
D. Sudden stratospheric cooling
Answer: Option A
Solution (By JKSSB Mock Tests)
Sudden stratospheric warming (SSW) is a phenomenon where the polar vortex weakens or splits due to a rapid increase in stratospheric temperatures, often leading to cold air outbreaks in the mid-latitudes.
What is the name of the phenomenon where the sea level pressure is lower than normal in the eastern Pacific and higher than normal in the western Pacific?
Explanation:
El Niño is associated with lower than normal sea level pressure in the eastern Pacific and higher than normal sea level pressure in the western Pacific.
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