What should we pay attention to in the climate characteristics of the great cold solar terms?

The Great Cold is the last solar term among the 24 solar terms, and it is also the last solar term in winter. The severe cold weather is relatively cold, so what are the climatic characteristics of the severe cold solar terms? What should we pay attention to in the cold? Next, let's take a look at this issue of the old almanac!

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Climatic characteristics of the great cold solar term The great cold falls in the second half of Gregorian calendar 1 month and the second half of lunar calendar1February, which is the last solar term in the lunar calendar. It means that the coldest time of the year has arrived, but the temperature gradually rises from low to high, often higher than the last solar term. The average temperature is -2-4℃, the lowest temperature is generally-14- 17℃, and the extreme minimum temperature can be reduced to -20℃. The lowest temperature in half a year appears in this solar term. The maximum frozen soil depth is 30-40cm, which is often the solar term with the deepest frozen soil in a year. 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 and constantly supplemented cold air, China will have a sustained low temperature. 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 and1~ 5mm in the mountainous areas of the northwest plateau. During the winter drought and the overwintering of crops 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 early spring crops to water in different areas according to different farming habits and conditions.

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What should we pay attention to in the cold? The solar term diet pays attention to the transition from the Great Cold to beginning of spring. In order to adapt to the change of seasons, people should gradually reduce their food intake in the severe cold and eat more food that rises and falls, in order to adapt to the rising trend of everything. At this time, the diet should pay attention to nourishing blood and qi, nourishing the viscera. Winter, as the last solar term, mainly supplements the spleen, and health care needs to pay attention to replenishing the spleen.

In the severe cold season, the Yellow River needs to prevent cardiovascular and cerebrovascular diseases, emphysema, chronic bronchitis, cardiovascular and cerebrovascular diseases and respiratory diseases. When the weather is cold, you should try to avoid going out in the morning and evening to prevent the disease from happening due to the large temperature difference between day and night. Wear a coat, mask, hat and scarf when going out.

In the cold season, the weather is cold when it is ventilated indoors, but it should be ventilated indoors in the morning and evening to prevent bacteria from taking advantage of it. For indoor heating, splash some water on the floor or take some wet towels to keep the indoor humidity. The indoor temperature should be kept at 15-20℃, not too high or too low. It is necessary to reduce the frequency of going to public places.

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Cold weather is taboo among the people, and it is taboo not to snow on sunny days. There is a proverb called "a bumper harvest year will be ushered in in cold and white weather", which also means that cold snow means a bumper harvest year. From the perspective of natural science, it will also be reasonable. Universities can kill locusts in winter, and will not cause insect disasters in the next year. Moreover, snow in winter can provide water for crops and store energy for spring, so it is appropriate to snow in cold weather.

The custom of severe cold solar terms coincides with the end of the year. In the severe cold solar terms, people should not only observe the solar terms, but also prepare for the new year. They are busy collecting and arranging Spring Festival couplets, sweeping dust and cleaning things, removing old and new cloth, preparing various sacrificial supplies, curing bacon, sausages, cooking chickens, ducks and fish, etc. At the same time, sacrifice ancestors and various gods in order to have a good weather in the coming year.

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