The beginning of autumn in the 24 solar terms is coming. The solar terms correspond to the four seasons of each year, and the beginning of autumn in the next month. Do you know the difference between the beginning of autumn and the autumnal equinox? The beginning of autumn indicates that the autumnal equinox begins day and night.
What is the beginning of autumn
Autumn begins: one of the 24 solar terms of the Chinese lunar calendar, on August 7, 8 or 9. Autumn is the beginning of autumn in China.
On August 7 or 8 of each year, the autumn begins when the sun reaches 135 & deg. "The moon makes seventy-two waiting for the set solution": "July Festival, the word solution to see spring (spring). Autumn, pull also, things here and pull convergence also. 'the beginning of autumn generally indicates that the hot summer is about to pass and autumn is about to come.
Although it is difficult to get rid of the heat for a while after the beginning of autumn, there is still the aftereffect of "autumn tiger". The beginning of autumn is also called jiaoqiu, but the general trend is that the weather is gradually cool. Due to different climates all over the country, the start time of autumn is not the same. In terms of climatology, the first day when the daily average temperature of every five days steadily drops below 22 ℃ is regarded as the beginning of autumn. This division method is more in line with the actual situation of each region, but it is quite different from the beginning of autumn in the middle and lower reaches of the yellow river.
After the beginning of autumn, the early rice harvest, the late rice transplanting in the central region of China, the autumn crops enter an important period of growth and development. Autumn means to cool down in summer, and autumn begins. The ancients regarded the beginning of autumn as an important moment at the turn of summer and autumn, and always attached great importance to this solar term.
The beginning of autumn, also known as July day. The time begins on August 7 or 8 of each year in the Gregorian calendar. In the Zhou Dynasty, the emperor led three princes and six princes to the western suburbs to welcome the autumn, and held a ceremony to sacrifice the little howl and the harvest (see the "ritual Worship & middot; monthly order"). The Han Dynasty still inherited this custom. "The history of sacrifice in the later Han Dynasty": on the day of the beginning of autumn, welcome the autumn in the western suburbs, sacrifice to the White Emperor for production and collection, white car flag clothing, song "Xihao", eight Yi dance "Yuming" dance. And a son of heaven entered the garden to shoot animals, to recommend the rites of the temple, known as the sun body Liu. Kill animals to sacrifice to show the intention of fighting in autumn. '
In the Tang Dynasty, every autumn, the five emperors were also sacrificed. "The book of the new Tang Dynasty: the book of rites and music records": "make autumn and winter to worship the five emperors in the four suburbs. 'in Song Dynasty, on the day of autumn, both men and women wore catalpa leaves to respond to the time sequence. There is a custom of cutting the red leaves of Phoebe and cutting the petals of Zan hairpin into the sideburns, and there is also a custom of swallowing seven little red beans in autumn (see the book of Lin'an's age). The Ming Dynasty inherited the Song Dynasty custom. In Qing Dynasty, on the day of the beginning of Autumn Festival, people were weighed by hanging scales. Compared with the number weighed in the beginning of summer, they were fat and thin in summer. Since the Republic of China, in the vast rural areas, in the day or night of the beginning of autumn, there is a custom of predicting the cold and hot weather. There are also watermelon, beans taste new, founder of the custom. Another day before the beginning of autumn, there are customs such as ice melon, steamed eggplant, fried Elsholtzia, etc.
What is the autumnal equinox
Autumnal equinox, the 16th solar term in the 24 solar terms of the lunar calendar, is usually on September 23 or 24 every year. The meaning of "half" is "half" of the autumnal equinox. In the ancient Chinese book "spring and autumn is full of dew, and Yin and Yang go in and out", it is said that "the autumnal equinox means that yin and yang are half the same, so it's cold and hot day and night. '
The meaning of "autumnal equinox" is two: first, the sun reaches 180 degrees of the Yellow longitude on this day, which is directed directly at the earth's equator. Therefore, the sun is evenly divided 24 hours a day, 12 hours a day, and there is no polar day or night in the world. After the autumnal equinox, the polar night range around the north pole and the polar day range around the South Pole increased.
Second, according to the division of seasons in ancient China, which starts with spring, summer, autumn and winter, the autumnal equinox is divided into 90 days in autumn. In ancient China, the autumnal equinox was divided into three periods: 'the first one is thunder, the second one is insects, the third one is water. The ancients believed that thunder was due to the strong Yang Qi. After the autumnal equinox, the Yin Qi began to flourish, so there was no more thunder.
Climate characteristics: according to the lunar calendar, 'Autumn start' is the beginning of autumn, and 'frost fall' is the end of autumn. The 'autumnal equinox' is exactly half of the 90 days from the beginning of autumn to frost fall. From the day of autumnal equinox, the climate has three main characteristics: the position of direct sunlight continues to move from the equator to the southern hemisphere, and the phenomenon of shorter days and longer nights in the northern hemisphere will become more and more obvious, with shorter days and longer nights (until the winter solstice day reaches the longest night and the shortest day); the temperature difference between the day and the night will gradually increase, with the range higher than 10 ℃; the temperature will drop day by day, and it will be colder day by day Gradually into the late autumn season. The opposite is true in the southern hemisphere.
In the autumn equinox, the Yangtze River Basin and the vast area to the north of it have successively entered the autumn, and the daily average temperature has dropped below 22 ℃. The northern air conditioning group began to have a certain influence. The rainy season was just over in most areas, with cool wind, blue sky, sunny, cool autumn, fragrant osmanthus, fat crab and yellow chrysanthemum. The autumn equinox is a beautiful and pleasant season. It is also an important solar term in agricultural production. After the autumnal equinox, the position of direct sunlight is moved to the southern hemisphere, and the solar radiation in the northern hemisphere is less and less, while the heat lost from the ground is more, and the speed of temperature reduction is obviously accelerated. There is a saying in the agricultural proverb: "one autumn rain, one cold night", "White Dew and autumn night, one cold night". In August, the gate of wild geese opens, and the feet of wild geese bring frost. "It's not surprising that the northeast region cools down early in the year, and the autumn equinox sees frost.
The weather is cooler at the autumnal equinox. Remember to pay attention to the amount of warmth. It will be cooler sooner or later. Cold is also a high incidence period.
The difference between the beginning of autumn and the autumnal equinox
In short: the beginning of autumn is the beginning of autumn, which is divided into days and nights.
A year has four seasons, i.e. spring, summer, autumn and winter, which means the beginning of a quarter. There are two seasons, i.e. spring equinox and autumn equinox, which can be understood as cutting a year into two parts, i.e. two minutes in time, two equinox in day and night. That is to say, the day is as long as the night when it comes to the equinox. There are two solstices: summer solstice and winter solstice. It can also be understood as cutting a year in half. In the middle of the year, on the day of 'Summer Solstice', the day is the longest and the night is the shortest; on the day of 'Winter Solstice', the day is the shortest and the night is the longest