Traditional Culture Encyclopedia - Weather forecast - Are clouds and frost caused by the drop in temperature? Is it essentially the same?

Are clouds and frost caused by the drop in temperature? Is it essentially the same?

Clouds and frost are caused by the drop in temperature, and the essence is the same.

Clouds are water droplets, supercooled water droplets, ice crystals or visible polymers formed by condensation (sublimation) of water vapor in the atmosphere floating in the air. Clouds are the tangible result of the huge water cycle on the earth. The sun shines on the surface of the earth, and water evaporates to form water vapor. Once the water vapor is supersaturated, water molecules will gather around the dust (condensation nucleus) in the air, and the generated water droplets or ice crystals will scatter sunlight in all directions, thus creating the appearance of clouds.

Frost is a kind of white ice crystal that condenses on the ground or objects when the air near the ground is cooled below the frost point (dew point below 0) due to the influence of radiation cooling on the ground. Frost is a weather phenomenon, which belongs to ground meteorological observation in China.

Frost is made up of ice crystals, similar to dew. When the relative humidity in the air reaches 100%, water is separated from the air. The only difference between them is that the dew point (the temperature at which water vapor liquefies into dew) is higher than the freezing point, while the frost point (the temperature at which water vapor condenses into frost) is lower than the freezing point, so frost will only appear when the near-surface temperature is lower than 0℃.