A. A cell of rising and sinking air over the Pacific Ocean
B. A type of thunderstorm
C. A wind pattern over the Atlantic
D. A cell of rising and sinking air over the equator
Answer: Option A
Solution (By JKSSB Mock Tests)
The Walker Circulation is a large-scale cell of rising and sinking air over the Pacific Ocean. Warm air rises over the western Pacific (near Indonesia) and sinks over the eastern Pacific. This circulation is disrupted during El Niño events.
Explanation:
A positive AO phase is characterized by lower than normal pressure over the Arctic and higher than normal pressure over the mid-latitudes. This tends to confine cold air to the Arctic, leading to milder winters in the mid-latitudes.
Explanation:
October Heat is caused by clear skies (intense solar radiation) and high humidity (from residual monsoon moisture) creating oppressive heat.
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