Understanding Monsoon Trough Movement During Break Conditions

A break-monsoon condition signifies a period where the monsoon rainfall becomes weak or ceases over most parts of the plains of India. This is a characteristic summer phenomenon.

Monsoon Trough Position Shifts Northward

During active monsoon periods, the monsoon trough typically lies over the plains of Northern India. However, during a break-monsoon spell, the trough weakens and its position shifts.

Specifically, the monsoon trough tends to move away from its usual position over the plains and moves northwards. Its northernmost position during such breaks is generally observed near the foothills of the Himalayas.

Analyzing the Options

• Option 1: closer to the southern foot hills of Himalaya - This aligns with the northward shift of the monsoon trough during break conditions.
• Option 2: northward beyond Himalaya - The trough shifts northward but typically does not move beyond the Himalayan range.
• Option 3: closer to Chennai - Chennai is in South India. A northward shift would move the trough away from this region.
• Option 4: over Kolkata - Kolkata is usually associated with the active monsoon trough over the plains, not a break condition.

Therefore, during a break-monsoon condition in summer, the monsoon trough moves closer to the southern foothills of the Himalayas.