______ are a narrow belt of high altitude (above 12,000 m) westerly winds in the troposphere. Their speed varies from about 110 km/h in summer to about 184 km/h in winter.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Jet Streams
- This description is about the "Jet Streams."
- High-altitude westerly winds that travel quickly in narrow bands in the upper troposphere and lower stratosphere are called jet streams.
- There are two jet streams in the Northern Hemisphere: the Polar Jet Stream and the Subtropical Jet Stream, and the Southern Hemisphere westerly jet.
- These swift air currents have a big impact on climatic systems and aviation routes in addition to being essential in determining weather patterns.
- As stated in the description, jet stream speeds can change with the seasons.