What is the significance of Westerly Jet Streams in winter?

Correct option is A

The correct answer is: (A) Guide Western Disturbances into India

Explanation:

• The Westerly Jet Streams are high-altitude winds that blow from west to east across the globe during the winter months.
• These jet streams play a significant role in guiding Western Disturbances towards India, which are low-pressure systems that bring rainfall and snowfall to the northwestern regions of the country.
• These disturbances are responsible for the winter rains in the north and northwest of India, including the Himalayas, where they also cause snowfall.

Information Booster:

• Westerly Jet Streams are typically stronger during the winter months due to the temperature differences between the tropical and polar regions.
• Western Disturbances are the main cause of winter precipitation in northern India, especially in the states of Jammu & Kashmir, Himachal Pradesh, and Uttarakhand.
• These disturbances are particularly crucial for the rabi crop season, providing the necessary winter rainfall.
• Westerly Jet Streams also influence the cold wave conditions in the northern plains of India during winter.

Additional Information:

• Option B: Cause retreat of monsoon – The retreat of the monsoon occurs after the monsoon season ends, and it is not directly influenced by the Westerly Jet Streams.
• Option C: Bring snowfall to Eastern Ghats – Snowfall is rare in the Eastern Ghats; it is more common in the northern regions, especially the Himalayas, due to Western Disturbances.
• Option D: Influence rainfall in Tamil Nadu – Rainfall in Tamil Nadu is mainly influenced by the northeast monsoon, not the Westerly Jet Streams.