Explain the mechanisms of rainfall variability across the Indian subcontinent. How do Western Disturbances and tropical cyclones complement the monsoon system?
Kartavya Desk Staff
Topic: Precipitation-Forms & Types, Distribution of rainfall
Topic: Precipitation-Forms & Types, Distribution of rainfall
Q1. Explain the mechanisms of rainfall variability across the Indian subcontinent. How do Western Disturbances and tropical cyclones complement the monsoon system? (10 M)
Difficulty Level: Medium
Reference: InsightsIAS
Why the question Rainfall variability is central to India’s climate discourse, with frequent droughts and floods. Western Disturbances and tropical cyclones have recently influenced monsoon performance. Key demand of the question The question asks to explain mechanisms behind rainfall variability in India and then analyse how Western Disturbances and tropical cyclones complement the monsoon system in sustaining rainfall and water resources. Structure of the Answer: Introduction Briefly define rainfall variability in India and its significance for agriculture, water, and livelihoods. Body Mechanisms of rainfall variability: mention orography, monsoon trough shifts, ENSO/IOD, land–atmosphere feedback, human influence. Role of Western Disturbances: winter rainfall, snowpack contribution, river flow support. Role of tropical cyclones: monsoon onset/retreat influence, supplementary rains, extreme rainfall contribution. Conclusion Summarise that variability is a complex interaction of regional and global systems and highlight the need for improved forecasting and climate resilience strategies.
Why the question Rainfall variability is central to India’s climate discourse, with frequent droughts and floods. Western Disturbances and tropical cyclones have recently influenced monsoon performance.
Key demand of the question The question asks to explain mechanisms behind rainfall variability in India and then analyse how Western Disturbances and tropical cyclones complement the monsoon system in sustaining rainfall and water resources.
Structure of the Answer:
Introduction
Briefly define rainfall variability in India and its significance for agriculture, water, and livelihoods.
• Mechanisms of rainfall variability: mention orography, monsoon trough shifts, ENSO/IOD, land–atmosphere feedback, human influence.
• Role of Western Disturbances: winter rainfall, snowpack contribution, river flow support.
• Role of tropical cyclones: monsoon onset/retreat influence, supplementary rains, extreme rainfall contribution.
Conclusion
Summarise that variability is a complex interaction of regional and global systems and highlight the need for improved forecasting and climate resilience strategies.