What does cold dew mean?

Cold means cold, which means that the temperature is obviously low. Dew, dew, dew. So cold dew is pure cold dew, cold dew. Dew is a natural phenomenon. It is a natural phenomenon that water vapor in the air condenses on surface objects when it is cold. Also refers to the condensed water in this case. Seemingly simple, the ancients used the common phenomenon of cold dew to express the change of natural climate.

Cold dew is the seventeenth of the twenty-four solar terms and the fifth in autumn. Fight with each other; Longitude of solar arrival195; Gregorian calendar1October 7 -9 10 every year. Cold dew is a festival in late autumn and the beginning of the full moon in the dry calendar. Cold dew is a solar term reflecting the characteristics of climate change. When entering the cold dew, there is cold air going south, the temperature difference between day and night is large, and autumn dryness is obvious.

Historical origin of cold dew

Cold dew is the end of the full moon in the dry calendar and the beginning of the full moon. At night, looking up at the starry sky, you will find that the "Big Mars" (Antares) representing midsummer has sunk into the west. After the cold dew, the height of the sun continued to decrease and the temperature gradually decreased. Cold dew is called "cold dew" because the temperature is much lower than that of Bailu solar terms, and cold produces dew condensation. "Twenty-four solar terms" said: "In September, the dew is cold and will condense." At this time, the temperature is lower than when it is "white dew", with more dew and chill day and night.

There is a proverb in China called "Dew first turns white and then cold", which means that after the dew festival, the dew turns from a little coolness in early autumn to a little coolness in late autumn. There is also a proverb about cold dew: "Cold dew spans three dynasties, and you need to find a bridge after crossing the water", which means that the weather is already chilly and you can't wade across the river or go to the fields barefoot as before.

During the cold dew, people can obviously feel the change of temperature difference. From white and crystal dew to freezing cold, it vividly reflects the continuous decline of temperature. As the cold intensifies, everything becomes dim.

The above contents refer to Baidu Encyclopedia-Cold Dew.