Traditional Culture Encyclopedia - Weather forecast - 20 19 What are the climatic characteristics of beginning of autumn on this day?
20 19 What are the climatic characteristics of beginning of autumn on this day?
Q: What is the date of the early autumn of 2065438+2009? A: Thursday, August 8, 20 19.
The origin of beginning of autumn is beginning of autumn where the sun moves southward from the Tropic of Cancer to longitude 135 every year. Twenty-four solar terms: "July Festival, set up a word to solve spring (beginning of spring). Autumn is also awkward, and this is the thing. " Beginning of autumn generally indicates that hot summer is coming and autumn is coming. After beginning of autumn, although the summer heat is hard to disappear for a while, there is still the afterglow of "autumn tiger", but the general trend is that the weather is getting colder and colder.
After beginning of autumn, early rice harvest, late rice transplanting and autumn crops entered an important growth and development period in central China. The ancients regarded beginning of autumn as an important moment at the turn of summer and autumn, and always attached great importance to this solar term. In the Song Dynasty, the plane tree planted in the pot had to move into the temple. It's time to "beginning of autumn", and the master shouted, "Autumn is here." After the play, the phoenix tree dropped one or two leaves to express autumn.
Due to the different climates in different parts of the country, the start time of autumn is also inconsistent. In climatology, autumn begins with the day when the daily average temperature drops steadily below 22℃ every five days. This division method is in line with the local reality, but it is quite different from the date of beginning of autumn in the middle and lower reaches of the Yellow River.
Beginning of autumn's climate feature "beginning of autumn" has arrived, but it is not the autumn climate. The division of climatic seasons should be based on the "average climate temperature", that is, the local average temperature is below 22℃ for five consecutive days, which is the real autumn. China is a vast country. Although the climate varies from place to place, most areas have not yet entered the autumn climate, and the last days of dog days are still the third day after beginning of autumn. Especially in the south of China, this solar term is still a hot summer. At the same time, because the typhoon and rainy season are about to pass and the temperature is even hotter, TCM calls the period from beginning of autumn to the autumnal equinox "long summer".
In fact, according to the standard of climatic division of seasons, the beginning of autumn is when the average daily temperature drops below 22℃ in the second half of the year. There are few areas in China where "beginning of autumn" falls in autumn, except the summer-free areas which are connected by winter and spring and autumn.
"It's so hot after autumn", the temperature is still high in most parts of China around beginning of autumn, and all kinds of crops grow vigorously. Mid-season rice blooms and bears fruit, round stems overnight, soybean pods, corn ears, cotton bolls and sweet potato tubers expand rapidly, and the demand for water is very urgent. The drought in this period will cause irreparable damage to the final harvest of crops. Therefore, there are sayings that "the rice turns into rice after three rains in beginning of autumn" and "the autumn rain is falling, and gold is everywhere".
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