The winter in the south depends on shaking the next sentence

The winter in the south is all about shaking.

a cold

(1) cold, Chinese vocabulary, Chinese pinyin is hán lěng, which means that the temperature is low and people feel cold. Cold can be divided into wet cold and dry cold. At the same temperature, wet cold is colder than dry cold. Cold refers to the feeling of chills and cold climate; Low temperature, feeling cold; Generally used to describe winter.

(2) The cold weather in China is the result of Siberian cold air going south frequently. Siberia is the "cold pole" in the northern hemisphere, which makes China the coldest in the same latitude in the world. Siberian cold air appears as a cold air mass heading south on the weather map. But the cold air mass is not isolated, and it is often part of a larger weather system-cyclone on the weather map.

(3) The cyclone is mainly composed of a pair of cold and warm air masses, with the cold air mass in the west and the warm air mass in the east. This extratropical cyclone rotates counterclockwise and moves from west to east at the same time. The dividing line between cold and warm air masses is called cold front. After the cold front, the local area entered the cold air mass from the warm air mass, and the wind direction changed from the south wind to the north wind.

(4) This is the reason why the proverb "The south wind blows to the end, and the north wind returns the gift". Therefore, severe cooling will occur after the cold front. China's climate is characterized by hot in the south and cold in the north, with a large temperature difference between the north and the south. There are two reasons for the cold winter climate in northern China. First, the direct point of the sun in winter is located in the southern hemisphere. The farther north, the shorter the day, and the lower the height of the sun at noon, the less solar radiation energy is obtained.