Traditional Culture Encyclopedia - Weather inquiry - What are the climatic characteristics of the great cold solar terms?
What are the climatic characteristics of the great cold solar terms?
What are the characteristics of the great cold solar terms?
First, the severe cold solar terms, the atmospheric circulation is relatively stable, and the circulation adjustment period 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 and constantly supplemented cold air, China will have a sustained low temperature. Like slight cold, great cold is also a solar term indicating the degree of cold weather. Modern meteorological observation records show that in some areas of China, severe cold is not as good as slight cold, but in some years and a few coastal areas, the annual minimum temperature 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.
? 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.
Second, it affects the growth of plants: for some crops, in a certain growth period, appropriate low temperature is needed. Wheat and rape with strong winterness need lower temperature through vernalization stage, otherwise they cannot grow and develop normally. Most of southern China is warm in winter all year round. Wheat and rape sown too early often grow too vigorously, bolting in advance, and their cold resistance is greatly weakened, which makes them vulnerable to low temperature frost. It can be seen that selecting crop varieties according to local conditions, sowing and planting in time and taking effective measures to promote and control are important links to win high yield.
Third, less rain and high cold: slight cold and severe cold are the periods with the least rain 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. However, "if you are bitter and cold, don't complain about the rain and snow. Snow is reserved for next year's wheat." 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. During this period, the cold wave frequently goes south, which is a rather cold period in most parts of China in a year. Railway, post and telecommunications, petroleum, maritime transportation and other departments should pay special attention to take measures as soon as possible to prevent severe weather such as strong winds and blizzards. Agriculture should strengthen the cold and antifreeze of livestock and wintering crops.
? ? About a month after the winter solstice, it entered the coldest season of the year-the great cold. I want to say that the bed is very warm, and I don't want to come out after I go in ~
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