Is there any scientific basis for the 24 solar terms that we have passed down to this day?

The spring rain is falling, the valley is clear, the summer is boundless, and it is hot in summer. ? . Autumn dew and autumn frost, winter snow and winter slight cold. The 24 solar terms of the China lunar calendar are well known in the international meteorological community. They are also called. China's fifth invention? . ? The fifth invention is based on science. Because? 24 solar terms? It is not only the intangible cultural heritage of mankind, but also the precious scientific heritage created by thousands of years of agricultural production practice of Chinese ancestors. From a climatological point of view, what are the 24 solar terms? In an interview, Zhou explained that this is the law of seasonal change and climate change that China people have gradually realized in their long-term production practice, which reflects China people's scientific attitude and correct views and methods towards nature. 24 solar terms? Originated in the Yellow River Basin.

The Yellow River basin divides the whole year into four seasons: spring, summer, autumn and winter to reflect the changes of four seasons, temperature, precipitation and phenology. This reflects the simple understanding of climate in ancient China. What do farmers in China rely on during the farming period? 24 solar terms? Arrange life and production. This scientific understanding then spread to overseas continents, affecting the whole world. From the perspective of modern meteorology, the formation of climate is mainly influenced by solar radiation, earth movement, atmospheric circulation and other factors. 24 solar terms? It is not explained from the angle, but reflects the ancient China people's cognition of natural phenomena and climate, and objectively reflects the unique climate characteristics of our country, such as the four seasons? Xiao Xia is the first book in China to record the changes of solar terms and phenology, and to record symbolic words and observation results. Which book is it? 24 solar terms? The foundation of formation. ? . ?

The ancients believed that five days should prevail, three days should prevail, six days should be one year old and four days should be one year old. The essence of climate is the mutual movement between the earth and the sun, and it is the organic combination of phenology and meteorology in the process of agricultural production practice. Zhou Bing said. Zhou said, in China? 24 solar terms? The system has been gradually completed. As early as the Spring and Autumn Period and the Warring States Period, people in China could measure the length of the midday sun shadow with a soil gauge (a pole on a plane). ?

Lu Xun explicitly mentioned the solstice in winter, the solstice in summer, the vernal equinox and nine points at the end of the Spring and Autumn Period and the Warring States Period. In a year, the shortest shadow day at noon is the summer solstice, the longest shadow day is the winter solstice, and the middle shadow day is the vernal equinox or September equinox. Huai Nan Zi compiled by Liu An in the Western Han Dynasty? 24 solar terms? There is a complete record, and the calculation method and related contents of solar terms are introduced in detail. This paper discusses the emergence of natural phenomena such as sun, moon, wind, rain and lightning and their influence on human social life order and agricultural production. It is particularly noteworthy that the Daomiao Observatory was established at the end of primitive society in 2 100 BC, nearly 500 years earlier than the Stonehenge Observatory in Britain (2 1680 BC).