In the Northern Hemisphere,the polar jet stream is strongest when
A) air north of the polar front is much colder than air south of the polar front.
B) air north of the polar front is much warmer than air south of the polar front.
C) air temperatures on opposite sides of the polar front are about equal.
D) air temperatures on the East Coast of the US are much colder than on the West Coast of the U.S.

Question

Quizplus · Accepted Answer

The polar jet stream is strongest when there is a large temperature gradient between air north of the polar front (which is much colder) and air south of the polar front (which is warmer). This creates a strong pressure gradient and results in a stronger jet stream.

In the Northern Hemisphere,the Polar Jet Stream Is Strongest When