What does the cold dew solar term mean?

0 1 Literally, "cold" means cold, and "dew" means that water vapor near the ground condenses into dew. The cold dew solar terms reflect the characteristics of climate change in most parts of China, that is, the temperature begins to drop, the summer heat fades, the autumn cold gradually appears, the hot and cold alternate, everything enters autumn scenery, the days gradually shorten, the nights gradually lengthen, and the temperature difference between day and night will increase.

The arrival of cold dew means that the temperature is lower than that of "white dew" at this time, and there is more dew, and the climate gradually changes from cool to cold and snowy, which is very beneficial to the autumn harvest. During the cold dew season, there are ancient customs such as enjoying chrysanthemums, drinking chrysanthemum wine and climbing mountains. Cold dew is the seventeenth of the twenty-four solar terms, which indicates the official start of the autumn season, and the date is June 7, 8 or 9 of the Gregorian calendar 10 every year. In China, cold dew is traditionally regarded as a sign of cold weather. The solar term of the Mid-Autumn White Dew is "dew condenses white", and it is already "dew cold, it will condense into frost" when it is cold in season and autumn.

"Twenty-four solar terms" said: "In September, the dew is cold and will condense." Cold dew means that the temperature is lower than that of the white dew, and the dew on the ground is colder and will soon condense into frost. In the cold dew season, Nanling and the vast area to the north have entered autumn, and the northeast and northwest regions have entered or are about to enter winter. In the capital Beijing, you can see the first frost in many years. In addition to the perennial snow on the Qinghai-Tibet Plateau, it has generally begun to snow in the northeast and northern Xinjiang.

In China, the cold dew is divided into three stages: "The first stage is the swan goose; Second, the sparrow enters the water and becomes a clam; Three chrysanthemums have yellow flowers. " In this solar term, geese move south in a line or herringbone queue; In the cold late autumn, all the birds disappeared. The ancients saw a large number of clams suddenly appearing on the seashore. The stripes and colors of shells were very similar to those of birds, and they thought they were birds. The third stage of "Chrysanthemum begins to blossom" means that the chrysanthemum has opened in a large area at this time.