What is the proverb of white dew?

The proverb of the Millennium is: the Millennium is white, and no one is allowed to sleep. The Millennium is white, and clothes are added at night.

Today's Millennium is a poetic and dreamy solar term. Autumn belongs to gold, it is golden and white. Because it is described in white, it is named "Bailu". "The white dew is white, no one is not sleeping, the white dew is white, and clothes are added at night." Such a rural proverb reflects that the weather turns from hot to cold in autumn except in Lingnan area.

There is a saying that "autumn night in the white dew is cool all night." "White dew is not exposed, cold dew is not exposed." It shows that the Millennium is the half month with the largest temperature difference between day and night among the 24 solar terms. Bailu, "Bailu is past the autumnal equinox, and farmers are busy." "The white dew is red, yellow and white, and the cotton fields are like the sea."

In the Millennium, the land of the motherland has gradually harvested from north to south. The folk saying is that the northeast, northwest and north China have truly reported the scenes of nature and people, and the northeast and northwest regions have begun to harvest rice, soybeans and sorghum. At this time, villagers in North China are also sharpening their knives and preparing autumn grain. "White dew cotton hoes three times, and the floc is thick and white." Busy fertilizing cotton for the last time.

Millennium is the15th solar term in the "twenty-four solar terms", and the third solar term in autumn is the end of the application of the moon in the lunar calendar and the beginning of the unitary month. Fighting fingers; The sun reaches longitude 165 degrees; Gregorian calendar September 7-9. "White dew" is an important solar term reflecting the growth of cold in nature. As the cold air turns to attack, it is sunny and hot during the day, but the temperature drops rapidly after the evening, and the temperature difference between day and night gradually widens.

Meteorological change

After entering the Millennium solar terms, the summer monsoon is gradually replaced by the winter monsoon, and the cold air gradually moves southward frequently. In addition, the position where the sun directly touches the ground moves south, and the sunshine time in the northern hemisphere becomes shorter and the sunshine intensity weakens. At night, it is often partly cloudy and sunny, and the ground radiation dissipates quickly, so the temperature drop is gradually accelerated. There is a saying called "Qiu Qiu in a thousand years, it is cold all night."

After the Millennium, the temperature difference between day and night gradually widened. Although the temperature is high at noon during the day, it is already very cold in the morning and at night. According to the standard of "average weather temperature" proposed by modern scholar Zhang Baokun, the average weather temperature is 10-22℃ in spring or autumn. According to this standard, from the beginning of the Millennium solar term, all localities began to enter autumn one after another.