How dew is formed, how dew is formed

The water of the dewdrops comes from the air. On days when the temperature is higher during the day, the temperature at night will drop, and the moisture in the air will condense, and the water vapor will condense on the leaf surface of the plant to a certain extent, and then concentrate on the protruding parts such as the leaf tips, forming dew drops. Dewdrop water is usually dirtier than ordinary water because it is mixed with pollutants from the air and dust on the leaves.

The air is saturated with water vapor due to cooling

In the warm season, when the ground object is strongly radiated and cooled at night, the temperature of the air in contact with the surface of the object drops, and the excess water vapor condenses into water droplets and adheres to the ground object.

Dew drops are rain that falls on leaves, flowers, and grass. The cause and process of dew formation is the same as that of frost, except that the temperature at which it forms is above 0°C. Dew generally forms at night, and after sunrise, when the temperature rises, the dew evaporates and disappears, and it exists for a short time.

Verses in praise of the dewdrops

1. A drop of dew in autumn lotus, falling into the sky at night; In the future, on the jade plate, it is uncertain to know the circle. - Tang Wei Yingwu's "Song of Dewdrops".

Meaning: There is a drop of crystal dew on the lotus leaf in autumn, which falls from the sky in the dark night. Huixin shook as if it was about to fall, and watched it roll around instead of standing still, only to realize that it was round instead of square.

2. A remnant sun spreads in the water, half of the river is sorrowful and half of the river is red. Poor and hidden on the third night of the first month of September, the dew is like a pearl and the moon is like a bow. - Tang Bai Juyi's "Twilight River Yin".

Meaning: In the evening, the sunset that is about to set is softly spread on the river. The river looks bright red in the sunset, but the green waves roll on the red.

How lovely the night of the third day of the ninth month was, with the dew drops on the grass stems and leaves on the shore like scarce pearls, and the rising crescent moon like a delicate bow.

3, the dew falls Su Hui, and the bright moon is He Lang. ——Wei and Jin Dynasty poet Lu Ji "Going to Luodao to make the second".

Meaning: The night dew drops, shining with white light, how bright the moonlight is.

4. The white dew is ambiguous and autumnal, and the moon is bright and clear. The traces are heavy on the beads and foils, and the jade plate is empty. When the bamboo moves, the bird is frightened, and the shahan dark trichomoniasis is shut. The garden is full of eternal night, and gradually wants to be the same as the frost. - Tang Dynasty Yongtao "Autumn Dew".

Meaning: The white dew adds a warm color to autumn, and the light of the moon illuminates the world in the clear and shallow sound of water leaking. The dew was so heavy that it wet the jewelry, and a drop fell on the jade plate and disappeared.

The wind blows the bamboo leaves and startles the resting birds. Dew on the grass and water fall on the bugs. The whole garden was full of life all night, as if it were about to fall with the frost.

1. In spring and autumn, the temperature changes greatly during the day and at night. During the day, the sun heats the earth and the air, and the ground and trees evaporate a lot of water vapor, and at night, the earth begins to cool, and the fastest cooling is the stones and trees, but the heat in the air is slower, and the air does not cool easily. The water vapor in the air comes into contact with the stone or tree that cools first and condenses into small droplets, which are called dew.

In the morning, it is still cold, and the dew will remain on the blades of grass or stones.

2. For plants, plants and roots absorb a lot of water, and this water should be dissipated through the leaves, because the temperature is high during the day, the water emitted by the leaves evaporates immediately, so it is invisible. At night, the air gets colder, and the moisture exhaled from the leaves does not evaporate and turns into water droplets, which are dew.