What is the difference between frost and frost?

Frost and frost are weather phenomena in autumn and winter.

Frost is caused by the air close to the ground being cooled down to the frost point by the radiation cooling of the ground. That is, the surface temperature or ground temperature of ground objects in the gas layer drops below zero, and the supersaturated part of water vapor is condensed into white ice crystals on some objects with poor heat transfer performance on the ground. Its structure is loose. Generally, it is formed in a period of time from night to early morning in cold season. When it is formed, it is mostly static wind. Frost sometimes appears in caves, cracks in glaciers and snow.

Frost usually occurs in the spring-autumn transition season, and the temperature is higher than ℃ during the day and drops below ℃ for a short time at night. In agricultural meteorology, it refers to the phenomenon that the temperature on the soil surface or near the plant crown drops below zero, which causes crop damage. When frost occurs, it is often accompanied by hoarfrost or not. Frost without hoarfrost is called "black frost" or "frost killing". On a clear and windless night, the frost formed by radiation cooling is called "radiation frost". Frost caused by cold air intrusion is called advection frost. The frost formed under the combined action of the two processes is called advection radiation frost. No matter what kind of frost appears, it will bring more or less damage to crops.