After five years, it began to snow again in Guangzhou. How is this ice particle formed?

Ice particles are a beautiful thing, giving people a very quiet feeling. Ice particles are a symbol of purity, so many people like ice particles. But ice particles can only be formed under certain conditions. As we all know, ice particles are solid state of water vapor, so the first condition for the formation of ice particles is to have enough water. After the water vapor is saturated, if the temperature is not reached, rainfall will be formed, which has the second condition for the formation of ice particles, temperature and nodules.

First, there must be enough water. The maximum amount of water vapor that air can hold at a certain temperature is the amount of water vapor saturation in Jiaozuo, and the temperature at which air reaches saturation is called dew point. Only when saturated air is cooled to a temperature below the dew point can there be excess water in the air, or water vapor can become water droplets and ice crystals. The saturated water vapor content of ice surface is lower than that of water surface, so the water vapor saturation of ice crystals is lower than that of water droplets. This means that water droplets can only grow when the relative humidity is not lower than 100%.

Second, there must be condensation nuclei in the air. If the water vapor in the air does not reach the condensation quota, it may condense into water droplets when the relative humidity exceeds 500%, but this supersaturation phenomenon does not exist in the atmosphere, so there will be so many rain ice particles on the earth. Condensation nuclei are solid particles suspended in the air, so there will be rain and ice particles.

Third, keep warm in freezing weather. As mentioned above, only when the temperature and humidity reach a certain level, the ice particles will drop, and the most suitable temperature for the human body is about 20 degrees, so the human body will feel very cold in the ice particle weather, so it is necessary to keep warm in the ice particle weather to prevent some negative effects brought by cold weather. In addition, after outdoor activities, if you sweat, you can't take off your clothes casually to prevent cold air from being inhaled after the pores are opened, which will cause adverse reactions to your body.