Characteristics and origin of solar terms in beginning of autumn

Characteristics and origin of solar terms in beginning of autumn

The characteristics and origins of solar terms in beginning of autumn are considered to be similar to those in beginning of autumn. Beginning of autumn, as one of the 24 solar terms, is a favorite solar term, because beginning of autumn symbolizes the end of summer and the beginning of autumn. What are the characteristics and origins of solar terms in beginning of autumn? Let's have a look.

Characteristics and sources of solar terms 1 in beginning of autumn

Beginning of autumn (one of the 24 solar terms)

Beginning of autumn, the 13 solar term in 24 solar terms, is the first solar term in autumn, which falls on August 7-9 of the Gregorian calendar every year. At this time, the bucket handle of the Big Dipper points southwest, and the sun reaches longitude 135. The twenty-four solar terms reflect the changes of "Qi" in the four seasons. Beginning of autumn is the node where the yang gradually closes, the yin gradually grows, and the yang gradually turns to yin. Beginning of autumn, which also means precipitation and humidity, is at the turning point of the year, with a downward or decreasing trend; In nature, everything begins to grow from lush to mature.

Beginning of autumn doesn't mean the extreme hot weather is over. Beginning of autumn is still in the summer heat period, and the summer heat will not come out until the second solar term in autumn, and the weather is still very hot in early autumn. The so-called "heat is in the dog days" is also called "fall after autumn". After beginning of autumn, there is at least extremely hot weather. According to the calculation method of "dog days", the days of "beginning of autumn" are often in the middle of dog days, that is to say, the heat is not over, and the real coolness usually comes after the Millennium solar terms. The watershed of summer heat is not in the solar terms in beginning of autumn.

After entering autumn, the climate changed from rainy and humid in summer to dry and rainy in autumn. In nature, the qi of yin and yang begins to change, the yang gradually closes, the yin gradually grows, and everything declines with the sinking of the yang. The most obvious change in autumn is that the leaves of vegetation change from lush green to yellow, and the leaves begin to fall and the crops begin to mature. Beginning of autumn is one of the "four seasons and eight festivals" in ancient times. People have the custom of offering sacrifices to the land gods and celebrating the harvest. There are also customs such as "pasting autumn fat" and "biting autumn".

Characteristics and origin of solar terms in beginning of autumn II. Meteorological change

At present, the four seasons are often divided according to the change of temperature, which is divided by the modern scholar Zhang Baokun's "climate average temperature". According to the climatic average temperature method, the average daily temperature for five consecutive days is between 10℃ and 22℃, which is regarded as autumn. In fact, according to the standard of dividing seasons in climatology, beginning of autumn will be when the average daily temperature drops below 22℃ in the second half of the year. Except for the summer-free areas connected with the spring and autumn all the year round, few areas in China have entered the "climate average temperature" in beginning of autumn (between 10℃ and 22℃ for five consecutive days).

The beginning of autumn doesn't mean the end of hot weather. After beginning of autumn, there was a summer solar term, which appeared after the summer solar term. China is a vast country. Although the climate varies from place to place, most areas have not yet entered the autumn climate of "average temperature", 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 rainy season gradually goes away, the temperature is even hotter, and Chinese medicine also calls the period from beginning of autumn to the autumnal equinox "long summer".

Beginning of autumn means rain, storm, humidity, etc. It is at the turning point of the year and tends to decrease or decline. Seasonal changes, rainfall, rainstorm, dry and wet changes in southern China are obvious; In the northern region, these changes are not obvious, but the temperature is obvious. After entering autumn, in nature, the qi of Yin and Yang began to change, everything began to grow from lush to mature, and the climate began to transition from rainy and humid in summer to dry and rainy in autumn. Beginning of autumn doesn't mean the hot weather is over. It is still very hot in early autumn. The so-called "hot dog days", some people say that there are at least "dog days" after beginning of autumn, and the real coolness is usually after the Millennium solar terms.