What is the reason for the northwest wind blowing in winter?

Because the temperature in our country's winter ocean is higher than that on land. The air flow is always in the direction of cold air flowing towards hot air. Therefore, winter winds always blow from the land to the ocean in the southeast. So the northwest wind blows in winter.

In areas where the sea is located in the north (such as Tianjin), northerly winds are prone to blowing in winter. The reason starts with the formation of the wind. Wind is formed by the flow of air. On the ground, it flows from low temperature to high temperature, which is what we usually call the wind direction.

In winter, the ocean currents in the sea also change greatly compared with summer. They are mostly cold currents. Due to the huge temperature difference between the ground and the sea surface caused by the cold current, cold winds are formed. At this time, the temperature of the sea surface It is much lower than the ground, and the wind formed is blowing towards the land, that is, north wind.

Extended information:

Monsoon climate is the main characteristic of my country's climate. my country's precipitation is mainly brought by the southeast monsoon. The southeast monsoon brings ocean water vapor to my country. The southeast coast of my country The region will be the first to receive the water vapor brought by the southeast monsoon, forming abundant precipitation, making it the region with the richest annual precipitation in my country.

The southwest monsoon also brings precipitation to my country and can affect southern my country; when the southwest monsoon develops and becomes strong, it can also penetrate deep into the Yangtze River Basin. The southern tropical and subtropical regions of my country are typical of rainy and hot weather conditions in the same period. Since precipitation in my country is mainly caused by water vapor brought from the ocean by the southeast monsoon, precipitation gradually decreases from the southeast coast to the northwest inland due to the influence of the summer monsoon.