What is the Southern Oscillation Index (SOI)? MCQ with Answer and Explanation

What is the Southern Oscillation Index (SOI)?
A. The difference in sea level pressure between the Atlantic and the Pacific
B. The difference in sea level pressure between Tahiti and Darwin
C. The difference in sea level pressure between the Azores and Iceland
D. The difference in sea level pressure between the Arctic and the Antarctic
Answer: Option B
Solution (By JKSSB Mock Tests)
The Southern Oscillation Index (SOI) is a measure of the difference in sea level pressure between Tahiti (central Pacific) and Darwin (northern Australia). A negative SOI indicates El Niño conditions, while a positive SOI indicates La Niña conditions.

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Practice More Climate and Weather Questions

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Which of the following is a characteristic of a tropical maritime air mass?
A. Warm and humid
B. Cold and dry
C. Warm and dry
D. Cold and humid

Correct Answer: Option A


Explanation:
Tropical maritime air masses are warm and humid, originating over warm tropical oceans. They bring warm, moist, and often unstable weather, leading to convection and precipitation.

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Question #2
Which of the following is a type of fog that forms when warm, moist air moves over a cold surface?
A. Advection fog
B. Radiation fog
C. Upslope fog
D. Valley fog

Correct Answer: Option A


Explanation:
Advection fog forms when warm, moist air moves over a colder surface (like a cool ocean or snow-covered ground), cooling the air to its dew point and causing condensation.

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Question #3
Which of the following states receives rainfall from both the Southwest and Northeast Monsoons?
A. Maharashtra
B. Kerala
C. Karnataka
D. Tamil Nadu

Correct Answer: Option D


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Tamil Nadu receives rainfall from both the Southwest Monsoon (June-September) and the Northeast Monsoon (October-December).

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