Question

Why is the subpolar low pressure belt formed?

Answer 1

Answer:

it is also due to the rotation of the earth. In the Subpolar region around latitudes 60° to 65° North and South of the Equator, the rotation of the earth pushes up the bulk of the air towards the Equator, creating a low pressure belt in this region. ... Winds always blow from high pressure to low pressure.

Answer 2

Sub polar low pressure belts are formed due to dynamically induced pressure belts that is to counteract the subtropical high belt and polar high pressure belt.

EXPLANATION:  

All the wind systems of the earth are formed due to uneven heating of Earth's surface by the Sun. We know that due to the revolution of the earth around the sun the surface of the earth is heated unevenly and this also causes changes in seasons as well as wind pattern of the earth.

There are majorly seven types of pressure belts, one equatorial low pressure belt formed at the equator  at 0° latitude, two subtropical high pressure belts in each hemisphere formed between 0° to 30° latitudes, two subpolar low pressure belts in both hemisphere between 35° to 60° latitudes and two polar high pressure belts in both the hemisphere between the poles.

Subpolar low pressure belts are formed in each hemisphere to counteract the high pressure belts of subtropical high pressure belt and polar high pressure belt.