The scientific name of cold dew

The scientific name of cold dew is first frost.

Cold dew means it's getting cold. When it comes to cold dew, the temperature will be lower than the white dew, and the dew on the ground will be colder, which is likely to become frozen dew, so it is called cold dew. Cold dew is a solar term that reflects the characteristics of climate change and is a transition from cool to cold.

The cold dew scares the autumn night, and the chrysanthemums turn yellow at first sight. Thousands of winds sweep the fallen leaves, and Wan Li geese follow the sun. 1October 8th, 65438+ 15: 22, 16 seconds, will officially usher in the cold dew solar term, and will be celebrated every year1October 7th to 9th.

Cold dew is the seventeenth of the twenty-four solar terms, belonging to the fifth solar term in autumn, indicating the official end of the autumn season.

Cold dew is a solar term reflecting the characteristics of climate change. Cold dew, white dew and first frost all indicate the phenomenon of water vapor condensation, and cold dew is a transition from cold to cold. After the cold dew, the dew increases and the temperature decreases. In China, cold dew is traditionally regarded as a sign of cold weather. From the calendar point of view, cold dew is the end of the full moon in the dry calendar and the beginning of the full moon, usually on June 8 or 9 of the Gregorian calendar 10 every year.

Related customs

Climbing high in the cold dew to enjoy the red leaves: For many people, the autumn is thick and the weather is fine, which is suitable for going out to enjoy the autumn, especially for climbing high and seeing the mountains all over the place.

Eating pears in cold dew: After cold dew, fruits from all over the country are listed. The weather is getting dry in autumn, and it is easy to get angry. Old people in rural areas have the habit of telling their children to eat pears; For some middle-aged and elderly people, a cup of chrysanthemum tea or a mouthful of chrysanthemum wine is also a good choice.

Eating flower cake in cold dew: After cold dew, leaves fall in autumn, flowers and trees wither gradually, and eating flower cake in cold dew means "keeping green". Moreover, flower cake is said to be promoted step by step and is a diet of cold dew and solar terms. Farming custom: The cold weather with dew is very beneficial to the autumn harvest. There is an agricultural proverb: yellow fireworks should also be collected, and lotus roots should not be collected until the fish is caught.

Soybean is harvested in the cold open air, pomegranate and hawthorn are picked. Cold dew peach is a late-maturing peach variety in the north, and its maturity is around cold dew peach, so it is named cold dew peach.