IGNOU MGG 5 2026 2027 - Describe the significance of jet streams in shaping global weather pat

Question

Describe the significance of jet streams in shaping global weather patterns and aviation
routes.

22 Jul 2026

Answer :

Word Count : 643

Jet streams are narrow bands of very strong winds that blow in the upper troposphere, generally between 9 and 16 km above the Earth's surface. They flow predominantly from west to east and are formed due to sharp temperature contrasts between different air masses, especially between polar and tropical regions. Their average speeds range from 100 to over 300 km per hour, although they may occasionally exceed 400 km per hour. Jet streams are among the most significant atmospheric circulation features, influencing weather systems, climate variability, and aviation operations across the globe. The two principal jet streams are the Polar Front Jet Stream and the Subtropical Jet Stream. The Polar Front Jet develops due to the strong temperature gradient between polar and mid-latitude air masses, while the Subtropical Jet

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