Characteristics of slight cold solar terms

The characteristics of slight cold solar terms are mainly reflected in the weather. During the slight cold solar term, there will be obvious weather changes such as "the weather is getting colder, not yet cold", "large area cooling", "significant cooling" and "frequent cooling process" in most parts of China.

The characteristic of slight cold is that the weather has turned cold, but it is not cold yet. The "March 9th" in the middle of winter is basically within this solar term, so there is a saying that "slight cold is better than severe cold". Two old folk proverbs, "A slight cold, freezing into a ball" and "Walking in the street, losing money", all describe the coldness of this solar term.

At the same time, it was also around the "March 9th", as the saying goes, "Cold is in the March 9th". This is because on the solstice of last winter, the surface received the least sunlight and heat, but the heat in the deep soil supplemented this, so it was not the coldest time of the year. From the solstice after beginning of winter, around March 9th, the heat in the deep soil was also consumed. Although the sunshine and heat increased slightly, it still made ends meet, so the lowest temperature in the whole year appeared.

In this solar term, most parts of China have entered a severe cold period, with frozen soil and frozen rivers. In addition, the cold air in the north continues to go south and the weather is cold. People call it "counting nine cold days" Although it is not as cold in the south of our country as in the north, the temperature has dropped obviously. The coldest time in the south is slight cold, between rain and fright. It is dry and cold when it is a little cold, and it is wet and cold after the rain.

During the slight cold solar term, the East Asian trough developed the strongest and most stable, the Mongolian cold high and Aleutian low also reached the strongest and most stable, and the ridge scale of the westerly trough reached the maximum, which matched the strongest westerly intensity. The cooling process of cold air is frequent in the slight cold season, but few of them reach the cold wave standard.