write a short note on jet streams
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Answer:
Jet streams are fast flowing, relatively narrow air currents found in the atmosphere at around 12 km above the surface of the Earth, just under the tropopause. They form at the boundaries of adjacent air masses with significant differences in temperature, such as of the polar region and the warmer air to the south.
Jet streams are winds that blow horizontally from west to east at a high speed near the tropopause and the stratosphere. These are high speed winds which influence the weather and climatic conditions of the region over which they blow.
There are two types of jet streams that blow at the tropical belt of 300 north latitudes- the westerly jet stream and the easterly jet stream.
A branch of westerly jet stream brings moderate to heavy rainfall followed by the cold waves to the Indian subcontinent.
The easterly jet stream also helps the Monsoon winds to blow into the greater part of India and brings monsoon showers.
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