Traditional Culture Encyclopedia - Weather inquiry - Is there dew in the summer morning?
Is there dew in the summer morning?
Above 0℃, the temperature at which air is saturated with water vapor due to cooling is called "dew point temperature". In warm seasons, when the ground objects are cooled by intense radiation at night, the temperature of the air in contact with the surface of the objects drops to the "dew point", and excess water vapor is precipitated. Because the temperature is above 0℃ at this time, these excess water vapor condenses into water droplets and adheres to ground objects, which is dew.
Dew, like frost, mostly appears on a clear night without wind or breeze. At the same time, objects that are prone to condensation are often objects with large surface area, rough surface and poor thermal conductivity. Sometimes, dew forms in the first half of the night, and the temperature continues to decrease in the second half of the night, which makes the dew on the object freeze. It's called frozen dew. Some people classify it as frost, but its formation process is different from frost.
Dew usually forms at night. After sunrise, the temperature rises and the dew evaporates.
Dew often appears in the growing season of crops. This is beneficial to agricultural production. In summer in northern China, evaporation is very fast. When there is little rain and drought, the leaves of crops are sometimes dried by the sun during the day, but when there is dew at night, the leaves will return to their original state. People often say "rain and dew", which is the reason. So go ahead! There is no dew anywhere this summer. When I was a child, I was at home. What a child! I get up early in the summer morning, so I often put on my shoes when I go to the mountains to play! Pants! Wet! It's all because of dew! Of course, dew brings us closer to nature. Dew can be used for beauty, medicine and so on!
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