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Count nine cold days. Which solar term starts from the winter solstice

DailyBird Culture 2021-10-09 1 0

refers to the change of weather in our life, but what aspects should we understand? Especially, what kind of problem does the first two words refer to? What is the weather change in our life?

冬至2 无字

number nine starts from what solar terms.

number nine starts from the winter solstice in Chinese folklore. The winter solstice was the first of the 24 solar terms. Many solar terms in ancient China began from the day of the winter solstice: "there will be strong wind and rain on the 16th day of the winter solstice, which is called cold food"; "Spring begins on the 46th day of the winter solstice.". The winter solstice is called "jiaojiu" or "count Jiu", that is, from the day of the winter solstice, it is divided into nine "jiu" every nine days. After counting the last nine, spring comes and the weather will be warmer and warmer.

counting nine weather is a miscellaneous solar term in China and one of the customs widely spread among the people in China. Counting nine is from the date of the winter solstice (it is also said that from the winter solstice), one "Nine" every nine days, and so on. The so-called "hot in three volts, cold in forty-nine", the coldest period of the year is "thirty-nine, forty-nine days". Count nine until the eighty-one day of "Nine Nine", when the peach blossoms bloom. At this time, the cold is exhausted and the weather is warm. Due to China's vast territory and great differences in climate, only some parts of China, not all over the country, correspond to the "September 81 day, nine peach blossoms bloom, and the warm day in late spring" on the day of the winter solstice. Some cold areas do not have the breath of spring in spring. Naturally, this is also because of China's vast territory.

the natural law of counting nine cold days

the coldest time in winter is before and after the cold solar term. After the beginning of winter, it means entering winter, which does not mean starting to be cold. Therefore, the heat stored on the surface in the second half of the year still has some energy, so it is not very cold. There is a saying among the people that "October little sunny spring" refers to the sunny, warm and comfortable "little sunny spring" weather during Mengdong. Therefore, in fact, it is generally not very cold in early winter (Mengdong), but with the passage of time, the cold air frequently goes south and the temperature gradually decreases. During the winter solstice, the day is the shortest, the angle between the direct sunlight angle and the ground is the smallest, and the sunshine intensity received by the ground per unit area is the smallest. Therefore, the ground receives the least solar heat every day, and the daily heat budget deficit has not reached the maximum. After the winter solstice, although the daytime increases day by day, the growth rate is very slow. From the winter solstice to the "March 9" period, the average daily growth is only about one minute. At the same time, the angle between the direct sunlight angle and the ground increases very slowly, so the temperature is the lowest in April 9.

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