what is jet stream?Control climate in india
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Answer:
Jet streams are the narrow belt of high altitude westerly winds in the troposphere. They blow at a fast speed of about 110km/h in summers to about 184km/h in winters. The westerly jet streams are responsible for bringing western cyclonic disturbances to north west India resulting in rainfall in winters.
Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of some planets, including Earth. On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds (flowing west to east). Their paths typically have a meandering shape. Jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including opposite to the direction of the remainder of the jet.