What is the Southern Hemisphere Westerly Jet?

Question

What does it do?

How does it affect the climate?

Answer 1

A narrow band of swiftly moving air found at very high altitudes.

The major jet streams are westerly winds (flowing west to east) in both the Northern Hemisphere and the Southern Hemisphere, although in the summer, easterly jets can form in tropical regions

Movements of the jet stream have important (but generally short-lived) effects on weather patterns.

Travel time in an airplane can be lengthened or shortened by the jet stream, depending on the direction of flight and the strength of the stream.