Brief introduction to the characteristics of severe cold solar terms

1. Climatic characteristics of severe cold solar terms: rain, snow, strong wind and low temperature. Great cold is the coldest of the 24 solar terms, and most parts of the north have entered the severe winter. During the severe cold solar term, the atmospheric circulation is relatively stable, and the adjustment period of circulation is about 20 days. When the circulation is adjusted, there will often be a wide range of rain, snow and strong winds.

In some parts of China, severe cold is worse than mild cold. However, in some years and a few coastal areas, the annual minimum temperature will still be within the severe cold solar terms. Therefore, it is necessary to continue to do a good job in the cold protection of crops, especially to protect livestock from wintering. In the severe cold season, the average temperature in most parts of southern China is 6℃ to 8℃, which is nearly 65438 0℃ higher than slight cold. The proverb "slight cold and cold, cold into a ball" shows that the great cold solar terms are also the cold period of the year.

3. Slight cold and severe cold are the periods with the least rainfall in a year. During the cold solar term all the year round, the rainfall in most parts of the south only increased slightly compared with the previous period, with 5 ~10mm in most parts of the south and only1~ 5mm in the mountainous areas of the northwest plateau. During the winter drought in South China, the water consumption is small, and the contradiction between supply and demand of farmland water is generally not prominent. In the case of scarce rain and snow, it is undoubtedly beneficial to the growth of wheat crops to water in different areas according to different farming habits and conditions.