What does the Millennium in the 24 solar terms mean?

The long hot summer is over and the depressed autumn begins. The Millennium after autumn is a festival that reflects the temperature changes in nature. Dew is a unique natural phenomenon after the Millennium solar terms. Now many young people don't know much about the meaning of solar terms. Then Lao Huangli will analyze the relevant knowledge about "Millennium" for everyone now.

The Millennium solar term is a meteorological change. Every year around September 7, when the sun runs to 165 degrees, it begins to enter the Millennium solar term. At this time, the crops are about to mature, the "autumn tiger" will also die, the temperature will begin to drop, and the weather will gradually turn cold. Millennium is the third solar term in autumn, indicating the end of Qiu Meng and the beginning of Mid-Autumn Festival. Dew is water droplets formed by condensation of water vapor on the ground or near-earth objects due to temperature drop. So the Millennium actually indicates that the weather is getting cold.

Millennium solar terms are natural changes. The weather is getting colder and the sun is still hot during the day. However, as soon as the sun returned to the mountains, the temperature dropped rapidly. At night, the water vapor in the air condenses to form tiny water droplets, which are very densely attached to the green stems and leaves or petals of flowers and trees, showing white color. Especially after the morning sunshine, it looks more crystal clear, flawless and charming, so it has won the reputation of "Millennium". After dew, the yin gradually increases, and the morning dew thickens and condenses into a layer of white water drops, so it is called dew.

The Millennium solar term began to frost for the first time. On August 15th, the geese opened the door with 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.

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