Why is the south wind blowing in summer and the north wind blowing in winter?

Affected by the monsoon, winter winds prevail in winter, and air flows from the northwest mainland, so the north wind blows in winter; Summer monsoon prevails in summer, so the south wind blows in summer. ?

East Asia, where China is located, is the most famous monsoon region in the world, and its monsoon characteristics are mainly manifested in the existence of two main monsoon circulations, namely the northwest monsoon prevailing in winter and the southwest monsoon prevailing in summer.

Because the degree of heating and cooling between the mainland and the ocean is different in a year (the specific heat capacity is different), the large-scale wind that changes direction regularly with the seasons between the mainland and the ocean is called monsoon. The most fundamental reason for the formation of monsoon is the difference of the earth's surface properties and thermal reflection. Due to land and sea distribution, atmospheric circulation, continental topography and other factors, headwinds prevail in winter and summer with a period of one year. It is divided into summer monsoon and winter monsoon.

Extended data

The influence of monsoon on climate;

Monsoon refers to the wind system in which the prevailing wind direction changes significantly with the seasons. Generally speaking, the stable prevailing wind direction between winter and summer is 120 ~ 180. According to research, there are several obvious monsoon climate zones in the world. Namely northern Australia, the Pacific Northwest and some areas along the Arctic Ocean. West Africa, East Africa, South Asia, Southeast Asia, East Asia and other places are regions with significant monsoon climate. East Asia-South Asia is the most famous monsoon climate zone in the world.

China is located in the East Asian monsoon region, which shows that the prevailing wind direction varies greatly with the seasons, even the opposite. In winter, northeast airflow prevails, and north China-northeast airflow is northwest airflow. Southwest airflow prevails in summer. To the east of China, the southeast air current also prevails in Japan. Winter is cold and dry, and summer is hot, humid and rainy, especially heavy rain. In the tropics, there are dry seasons and rainy seasons. The pre-flood season in South China, the rainy season in Jianghuai, the rainy season in North China and Northeast China all belong to summer monsoon rainfall.

Baidu encyclopedia-monsoon