Jet Streams

Jet streams are fast-flowing narrow air currents found in the upper atmosphere. These air currents travel west to east and can reach speeds of up to 320 km/h. They are found at an altitude of around 9-16 km and can be several hundred kilometers wide.

Formation of Jet Streams

Jet streams are formed due to the temperature difference between the polar and equatorial regions. The polar regions are colder, and the equatorial regions are warmer. This temperature difference creates a pressure gradient, causing the air to move from the equator to the poles. The rotation of the earth causes the air to move in a curved path, resulting in the formation of the jet streams.

Types of Jet Streams

There are two main types of jet streams - polar jet streams and subtropical jet streams. Polar jet streams are stronger and found at a higher altitude than subtropical jet streams. They are located at around 9-12 km in the northern hemisphere and around 10-13 km in the southern hemisphere. Subtropical jet streams are weaker and found at a lower altitude than polar jet streams. They are located at around 8-11 km in the northern hemisphere and around 9-12 km in the southern hemisphere.

Impact of Jet Streams

Jet streams play an important role in weather patterns, particularly in the mid-latitudes. They can influence temperature, wind patterns, and storm systems. They are also used by airlines to plan flight routes and save fuel.

Conclusion

In conclusion, jet streams are fast-flowing air currents found in the upper atmosphere. They are formed due to the temperature difference between the polar and equatorial regions, and they play an important role in weather patterns. Understanding jet streams is important for weather forecasting, aviation, and climate research.

Option D) Jet Stream is the correct answer because they are ribbon of very strong winds.