What does the Millennium in the 24 solar terms mean?

Millennium is the third solar term in autumn, marking the end of Qiu Meng and the beginning of Mid-Autumn Festival. When the sun reaches 165 degrees, it is the Millennium solar term.

It is called the Millennium because the spirit of the sun reaches its peak in the summer solstice, and the poles will be reversed, and Yin Qi will also rise at this time. When it comes to the White Dew, the yin gradually increases, and the morning dew gradually thickens and condenses into a layer of white water drops, so it is called the White Dew.

The Millennium actually indicates that the weather is getting cold. At this time, people will obviously feel that the hot summer has passed and the cool autumn has arrived.

As the saying goes, "eighteen pots of summer heat, not exposed to the Millennium." These two sentences mean that it is still hot in summer, so you must take a bath with a basin of water every day. After eighteen days, in the new millennium, don't be shirtless and naked, lest you catch cold. There is also a saying: "White dew and white fans, the autumn equinox is beautiful." This means that if there is dew before and after the white dew, the late rice will have a good harvest.

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Weather characteristics

After plants began to have dew entering the Bailu solar term, summer monsoon was gradually replaced by winter wind, cold air turned to attack, and warm air gradually retreated. Cold air going south in batches will often bring a certain range of cooling. People like to use the proverb "it's cold in the autumn night in the white dew" to describe the situation that the temperature drops rapidly.

At this time, the precipitation in northern China is obviously reduced, and the autumn is crisp and dry. During this period, the first autumn rain in the middle and lower reaches of the Yangtze River can often alleviate the previous water shortage. However, if the cold air meets a typhoon, or the cold and warm air are evenly matched, the two sides are in a dilemma, and heavy rain or low temperature and continuous rain are not good for the growth of autumn crops.

Continuous rainy weather often occurs in the eastern part of Southwest China, South China and West China.

There may be heavy rain caused by tropical weather system (typhoon) in the southeast coast, especially in the south China coast. In addition, autumn drought, forest fire and first frost may also occur in some areas at this time. If the summer droughts in the middle and lower reaches of the Yangtze River, West China and South China are not nourished by autumn rain, summer and autumn droughts may all form.

There is a proverb that says, "There is no drought in spring, and the drought in autumn is halved. Building houses in spring drought and breaking grain in autumn drought. " In some northern areas, such as Shaanxi, Shanxi, Gansu, North China and other places in the northwest, autumn precipitation is inherently less. If severe autumn drought occurs, it will not only affect the harvest of autumn crops, but also delay the sowing and emergence growth of autumn sowing crops and affect the harvest of the following year.

With the autumn drought, especially the dry air and the increasing wind in mountainous forest areas, the forest fire risk in autumn began to enter a high incidence period.

These geese have frost on their heads. "Frost is caused by the invasion of cold air. The daily average temperature is above 0℃, and the surface temperature drops below 0℃. The water between crop cells freezes, constantly absorbing the water in the cells, leading to cell dehydration and crop withering or death. ?

Sometimes, although there is no frost on the surface of plants, crops will still be frozen because the surface temperature is below 0℃. This phenomenon is called black frost and it is also a kind of frost.

References:

Baidu encyclopedia-white deer