Question

Q. With reference to jet streams, consider the following statements:

Which of the above statement(s) is/are correct?

• A.
  1 and 3 only
• B.
  2 only
• C.
  2 and 3 only
• D.
  1, 2 and 3

Answer 1

The correct option is D

1, 2 and 3
Explanation:

Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere.

Statement 1 is correct: Jet streams travel in the tropopause—the area between the troposphere and the stratosphere—at heights of about 8 to 15 kilometers (5 to 9 miles).

Statement 2 is correct: They are formed at the junction of different cells as per the tri cellular model.

Statement 3 is correct: Jet streams are stronger in winter in the northern and southern hemispheres, because that's when air temperature differences that drive them tend to be most pronounced.