Monsoon Trough and Rainfall Distribution
The monsoon trough is a low-pressure area that forms over Northwest India and Pakistan during the summer monsoon season (June to September). This trough is crucial in determining the distribution of rainfall across India.
Winds associated with the monsoon flow converge towards the trough axis. This convergence leads to rising air, cloud formation, and ultimately, rainfall.
Rainfall Patterns Relative to the Trough
Meteorological studies and observational data show that the heaviest rainfall during the June-September period typically occurs in regions situated:
- To the South of the monsoon trough: This area often experiences the most intense monsoon activity and receives significant rainfall.
- Regions to the North or West of the trough generally receive less rainfall compared to the southern side. The axis itself might experience rainfall, but the heaviest concentration is usually found slightly away from the immediate axis, towards the south where moisture-laden winds are most active.
Therefore, the average June-September rainfall in India is generally more pronounced to the South of the monsoon trough.
Important Questions from Indian Monsoon and Severe Weather
- Which one of the following statements about Western disturbances is FALSE?
- Choose the FALSE statement amongst the following:
Choose the correct combination of the physical properties (A, B, C and D) that are TRUE for the Indian summer monsoon system.
A – deep, B – moist, C – barotropic, D – baroclinic
Choose the correct combination of the following statements (A, B, C and D) that is TRUE for the Indian Northeast monsoon.
A. Northeast India gets maximum rainfall.
B. The winds are north-easterlies over Bay-of- Bengal.
C. Maximum number of tropical depressions, storms and cyclones are formed over Arabian Sea.
D. ITCZ is located south of $20^\circ\text{N}$
- During a break-monsoon condition in summer, the monsoon trough moves
