What about jet streams and how do they affect the climate of India
Answers
Jet streams are a narrow belt of high altitude (above 12000 m) westerly winds in the troposphere.
(a) Their speed varies from about 110 km/h in summer to about 184 km/h in winter.
(b) A number of separate jet streams have been identified.
(c) The most constant are the mid latitude and subtropical jet streams.
(d) Jet streams over the Indian peninsula during the summer affect the monsoon.
(e) The subtropical westerly jet stream blow south of the Himalayas and is responsible for the western cyclonic disturbances experienced in the north and north
western parts of the country.
(f) An easterly jet stream blows over peninsular India. It affects the coastal regions of the country and is responsible for tropical cyclones during the monsoon as well
as during the October to November period.
The easterly jet streams cause tropical depressions during the monsoon as well as October-November months. Jet streams are fast flowing winds blowing in a narrow zone in the upper atmosphere. In winter, the subtropical westernly jet streams bring rain to the western part of India.