The characteristics of the great cold solar terms: extreme cold

Great cold is also a solar term representing cold weather. Although many records of modern meteorological observation show that in most parts of China, the severe cold is not as good as the slight cold, in some years and a few coastal areas, the annual minimum temperature will still appear in the severe cold solar terms. In the severe cold season, the average temperature in our basin is mostly 6℃ to 8℃, which is nearly 65438 0℃ higher than that in the slight cold season. The proverb "slight cold, severe cold and cold in a lump" shows that the severe cold solar term is also a cold period of the year.

Climatic characteristics of severe cold solar terms: rain and snow, strong wind, cold wave 1, rain and snow weather and large-scale strong wind cooling.

During the severe cold solar term, the atmospheric circulation is relatively stable, and the adjustment period of circulation is about 20 days. When this circulation is adjusted, there will often be a wide range of rain and snow weather and strong winds to cool down. When the west of 80 degrees east longitude is a long wave ridge and East Asia is a coastal trough, under the influence of northwest wind flow control and constantly supplemented cold air, China will have a sustained low temperature. In some parts of China, severe cold is not as cold as slight cold, but in some years and a few coastal areas, the lowest temperature in the whole year will still appear in 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.

This is the least rainy time in a year.

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, severe cold, cold into a ball" shows that the severe cold solar term is also a cold period of the year. 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.

3. Cold waves are frequent.

During the great cold, the cold wave frequently goes south, which is a very cold period in most parts of China in a year. Railway, post and telecommunications, petroleum, shipping and other departments should pay special attention to taking measures to prevent severe weather such as strong winds and blizzards as soon as possible. Agriculture should strengthen the cold and antifreeze of livestock and wintering crops.