Question

what is jet stream.....​

Answer 1

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Here is ur Answer !!

Answer:

Jet streams are bands of strong wind that generally blow from west to east all across the globe. They impact weather, air travel and many other things that take place in our atmosphere.

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Answer 2

$\large\fbox\color{teal}{ Jet \: stream }$

✿a narrow variable band of very strong predominantly westerly air currents encircling the globe several miles above the earth. There are typically two or three jet streams in each of the northern and southern hemispheres.

"brief bursts of cold air have been blown into the region by the jet stream"

$\bold{ OR }$

✿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. Their paths typically have a meandering shape.

$\large\underline\mathtt\color{midnightblue}{ How \: does \: it \: work? }$

✿Jet streams form as air in the upper atmosphere moves from south to north and gets deflected to the east by the Coriolis effect. The jet stream will get stronger if the warmer temperatures are to the south and the colder the air is to the north. ... A jet streak is an area of much faster winds within the jet stream itself.

Not a copied answer, written by me, hope this will help you.