Explaining the phenomenon of Western Disturbance, discuss its impact on the Indian weather system.

Western disturbances are the temperate cyclones that bring rainfall in Indian north subcontinents during winters.

Inter alia cyclic weather pattern with subtropical westerly jet stream.

Key occurrence of western disturbance:

PHENOMENON OF WESTERN DISTURBANCE:

1. The sub-tropical westerly jetstream pickup come temperate cyclone (low pressure)

2. The water from mediterranean sea & caspian sea is evaporated

3. It brings rainfall in the North within the Ravi Raj and Eastern India

IMPACT ON INDIAN WEATHER SYSTEM:

1. Brings winter rainfall

2. Enhances the cold spell

3. Clears the pollution in lying areas

4. Essential for the Kharif crop

The western disturbance is crucial for Indian weather systems as they provide rainfall during the spell of NE offshore monsoon. They make the northern mountains snell and cleft the cold spell.

The climatic patterns of India are taking a hit in face of climate change, the intensity and frequency of western disturbances is also decreasing due to it.