What is the weather forecast?

The weather symbol indicates frosty weather. It is a common agrometeorological disaster, which means that the temperature drops suddenly, and the surface temperature drops below 0℃, so that crops are damaged or even killed.

Frost is water vapor (that is, gaseous water). At very low temperatures, this is a condensation phenomenon, very similar to snow. On cold winter mornings, outdoor plants usually frost. This is because plants dissipate heat slowly at night, the ground temperature is particularly low, and the water vapor is not emitted quickly. When it gathers on the surface of plants, it freezes and forms frost.

Causes of frosting

Frost is mostly in the transition season of spring and autumn, with the temperature above zero degrees Celsius during the day and below zero for a short time at night. In agrometeorology, it refers to the phenomenon that the temperature on the soil surface or near the plant crown drops below zero, causing crops to suffer. When frost occurs, it is often accompanied by or without hoarfrost. Frost without hoarfrost is called black frost.

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 by these two processes is called advection radiation frost.