Which of these is a consequence of a strong pressure gradient force, especially in the mid-latitudes, and is strongest in the winter season?
A) polar-front jet stream
B) subtropical jet stream
C) low-level jet stream
D) none of the above
Question 2
Wind speeds generally increase with height between the surface and the tropopause mostly because of:
A) increasing friction.
B) decreasing friction.
C) the pressure gradient force is stronger at high altitudes.
D) the pressure gradient force is stronger at low altitudes.