What are jet streamsand how do they affect the climate of india?
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Jet stream, narrow, swift currents or tubes of air found at heights ranging from 7 to 8 mi (11.3–12.9 km) above the surface of the earth.
They are caused by great temperature differences between adjacent air masses. There are four major jet streams. Although discontinuous at some points, they circle the globe at middle and polar latitudes, both in each hemisphere.
The easterly jet stream steers the tropical depressions into India. These depressions play a critical role in distribution of monsoon rainfall over the Indian subcontinent.
During the early summer months, increased solar heating begins to heat the Indian subcontinent, which would tend to set up a monsoon circulation cell between southern Asia and the Indian Ocean.
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