What does frost mean?

Frost is a common agrometeorological disaster, which means that the temperature drops suddenly and the surface temperature drops below 0℃, causing damage to crops and even death.

Frost usually appears in autumn, winter and spring. It is different from frost. "Frost" is a white ice crystal that condenses directly on objects when the water vapor in the air near the ground reaches saturation and the ground temperature is lower than 0℃. When there is frost, it is not necessarily frost. There may not be frost in first frost, and there may not be frost in first frost.

The solar terms "first frost", "first frost" and "First Frost" are not the same thing, but three different concepts. "Frost" refers to a white ice crystal formed by condensation of water vapor on the ground in cold weather; "Frost" refers to a common agricultural meteorological disaster phenomenon; The "first frost" solar term refers to the season that reflects the sudden drop of temperature.

Frost is a common agricultural meteorological disaster, which occurs in winter and spring, and is mostly caused by the cold wave heading south and the temperature dropping sharply below zero degrees Celsius in a short time. Still affected by the cold wave, the weather changed from cloudy to sunny that night, which was caused by strong radiation cooling on the ground. This is what people often say "adding insult to injury". When the temperature is lower than the ground, the water vapor condenses into white crystals on the surface of the object. The water vapor content is less, and it is called black frost without frost; Frost damage to crops is called frost.

First frost, first frost and the first frost solar terms are not the same thing, but three different concepts. "Frost" refers to white ice crystals formed by condensation of water vapor on the ground in cold weather; "Frost" refers to a common agricultural meteorological disaster phenomenon; The "first frost" solar term refers to the season that reflects the sudden drop of temperature.