Why does the northwest wind blow in winter?

The temperature on the sea and land in our country is different. In winter, the temperature of the ocean is higher than that of the land. The air flow is always in the direction from cold air to hot air. So the winter wind always blows from the land to the southeast sea, which is why the northwest wind always blows in winter.

In areas where the sea is located in the north (such as Tianjin), it is easy to blow the north wind in winter, and the reason should start from the formation of the wind. Wind is formed by air flow. On the ground, 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 more than in summer, mostly cold and cold. Due to the huge temperature difference between the ground and the sea surface formed by the cold current, a cold wind is formed. At this time, the temperature of the sea surface is much lower than the ground, and the formed wind blows to the land, that is, the north wind.

Extended data:

Main features of climate in China:

China's climate is characterized by high temperature and rainy summer, cold and little rain in winter, and the high temperature period is consistent with the rainy period.

Because China is located in the east of Eurasia, the largest continent in the world, on the west coast of the Pacific Ocean, and near the Indian Ocean in the southwest, the climate is greatly influenced by the mainland and the ocean. In winter, the north wind blows from the mainland to the ocean, and in summer, the south wind blows from the ocean to the land.

Winter winds are produced in the interior of Asia, which is cold and dry. Under its influence, there is little precipitation and low temperature in most parts of China in winter, especially in the north. The summer monsoon comes from the Pacific Ocean in the southeast and the Indian Ocean in the southwest, and it is warm and humid. Under its influence, precipitation generally increases, and rain and heat are in the same season.

China is widely influenced by the alternation of winter and summer monsoon, which is the most remarkable and typical region in the world. Compared with other parts of the world at the same latitude, the temperature in China is low in winter and high in summer, with a large annual variation, and precipitation is concentrated in summer, which is the characteristic of continental climate. Therefore, the monsoon climate in China is continental, which is also called continental monsoon climate. ?

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