A negative phase of the Arctic Oscillation (AO) is associated with: MCQ with Answer and Explanation

A negative phase of the Arctic Oscillation (AO) is associated with:
A. Warmer than normal temperatures in the Arctic
B. Cooler than normal temperatures in the Arctic
C. Lower than normal pressure over the Arctic
D. Higher than normal pressure over the Arctic
Answer: Option D
Solution (By JKExamLibrary)
A negative AO phase is characterized by higher than normal pressure over the Arctic and lower than normal pressure over the mid-latitudes. This allows cold Arctic air to spill southward, leading to colder winters in the mid-latitudes.

This question belongs to: Geography GK Climate and Weather

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Practice More Climate and Weather Questions

Question #1 Report Error
The 'Sub-Tropical Jet Stream' (STJ) is associated with:
A. Summer monsoon
B. Post-monsoon cyclones
C. Retreating monsoon
D. Winter season

Correct Answer: Option D


Explanation:
The Sub-Tropical Jet Stream (STJ) is active during winter and influences Western Disturbances that bring rainfall to northern India.

This question belongs to: Geography GK Climate and Weather
Question #2 Report Error
What is the name of the global-scale climate phenomenon that influences the Indian monsoon?
A. Arctic Oscillation (AO)
B. Pacific Decadal Oscillation (PDO)
C. North Atlantic Oscillation (NAO)
D. El Niño-Southern Oscillation (ENSO)

Correct Answer: Option D


Explanation:
The El Niño-Southern Oscillation (ENSO) is a global-scale climate phenomenon that significantly influences the Indian monsoon, with El Niño often associated with weaker monsoons and La Niña with stronger monsoons.

This question belongs to: Geography GK Climate and Weather
Question #3 Report Error
Which of the following is the primary reason for the high rainfall in the northeastern states of India?
A. Convection
B. Frontal systems
C. Cyclones
D. Monsoon winds and orographic lifting

Correct Answer: Option D


Explanation:
The northeastern states, including Meghalaya, receive high rainfall due to the orographic lifting of the southwest monsoon winds by the Himalayas and the Eastern Ghats, causing heavy precipitation.

This question belongs to: Geography GK Climate and Weather