Question

What might cause a cold spell in the northern United States?

a the doldrums move south
b the subtropical high moves north
c the subtropical jet stream moves north
d The polar jet stream moves south

Answer 1

D) The polar jet stream moves south

Step-by-step explanation:

The 50°-60° N/S region is where the polar jet is located with the subtropical jet located around 30° N . Jet streams vary in height from four to eight miles and can reach speeds of more than 275 mph (239 kts / 442 km/h ). Jet streams occur in both the Northern and Southern Hemispheres.