diagram of jet stream in india
Answers
Explanation:
What is a Jet Stream?
The Jet Stream is a geostrophic wind blowing horizontally through the upper layers of the troposphere, generally from west to east, at an altitude of 20,000 - 50,000 feet.
Jet Streams develop where air masses of differing temperatures meet. So, usually surface temperatures determine where the Jet Stream will form.
Greater the difference in temperature, faster is the wind velocity inside the jet stream.
Jet Streams extend from 20 degrees latitude to the poles in both hemispheres.
Types of Jet Streams
Sub Tropical Jet Streams are best developed in winter and early spring. Their maximum speed approaches 300 knots which are associated with the merger with polar-front jets. A subsidence motion accompanies subtropical jets and gives rise to predominantly fair weather in areas they pass over. Sometimes they drift northward and merge with a polar-front jet.
Tropical Easterly Jet Stream occurs near the tropopause over Southeast Asia, India, and Africa during summer. This jet implies a deep layer of warm air to the north of the jet and colder air to the south over the Indian Ocean. The difference in heating and cooling and the ensuing pressure gradient is what drives this jet.
Polar-Night Jet Stream meanders through the upper stratosphere over the poles. They are present in the convergence zone above the sub polar low pressure belt.
