The polar cold air moves south strongly and the sub-polar low pressure zone moves north, which can better explain the cold weather in Europe?

1. The polar latitude is the highest, the solar radiation is less, the ground properties are relatively simple, and it is easy to form cold air masses (ice ocean air masses and polar continental air masses). Cold air mass has low temperature and high pressure, which can be called polar high pressure.

After the cold air mass is formed in the local area, it will go south, leading to the cooling of its southern region. At the same time, as the cold air mass moves southward, it will gradually weaken and disappear by exchanging heat with the passing area (air mass nature).

Generally speaking, the process of cooling down again and again in a place is actually the process of cold air mass passing through this place again and again.

2. The formation of pressure zone is related to the direct point of the sun. Whether the subtropical low, subtropical high or equatorial low moves northward, it is essentially the northward movement of the direct point of the sun.