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When the air in equatorial areas becomes warmer and less dense than the surrounding air, it rises to be replaced by air flowing in from other, cooler areas. Discuss the various factors responsible for the formation of global wind belts.

Topic: Salient features of world’s physical geography.

3. When the air in equatorial areas becomes warmer and less dense than the surrounding air, it rises to be replaced by air flowing in from other, cooler areas. Discuss the various factors responsible for the formation of global wind belts.  (250 words)

Difficulty level: Moderate

Reference: Insights on India

Why the question:

The question is part of the static syllabus of General studies paper – 1 and mentioned as part of Mission-2023 Secure timetable.

Key Demand of the question:

To write about factors affecting horizontal movement of air, causes behind wind belts and their distribution.

Directive word: 

Discuss – This is an all-encompassing directive – you must debate on paper by going through the details of the issues concerned by examining each one of them. You must give reasons for both for and against arguments.

Structure of the answer:

Introduction: 

Begin by giving context regarding wind belts.

Body:

First, draw a neat labelled diagram showing the global distribution of various wind belts and explain each belt in detail. The three major global wind belts are polar easterlies, westerlies, and trade winds.

Next, explain the factors that lead to the development of pressures belts – Atmospheric Pressure Gradient, Coriolis Effect, Frictional Force etc, Earth’s revolution, Seasonal variations.

Conclusion:

Conclude by summarising.